TY  - JOUR
AU  - Milić, Mirjana M.
AU  - Matić, Vladimir M.
AU  - Lazarov, Nenad Đ.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4227
AB  - An extended ASYNNNI model, that beside nearest-neighbour and next-nearest neighbour O-O interactions in the basal plane also includes interactions between the three nearest oxygen atoms, is used to describe the statistics of CuO chain fragmentation and to calculate doping and T (c) in YBa2Cu3O6+x . Calculations were made by the Monte Carlo method employing the recently proposed charge transfer model that assumes only chains whose length is equal to, or exceeds, a characteristic (critical) length, l (cr) , can provide holes to the layers and contribute to doping p. The obtained p(x) is then combined with a universal T (c) versus p relation to yield T (c) (x) characteristics that correlate remarkably with those reported in recent experiments. The best coordination between theoretical and experimental T (c) (x) characteristics has been achieved for l (cr) = 2, implying that only isolated basal plane oxygen atoms (trivial chains) do not contribute holes to CuO2 layers.
T2  - Central European Journal of Physics
T1  - The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model
VL  - 9
IS  - 3
SP  - 690
EP  - 697
DO  - 10.2478/s11534-010-0060-6
ER  - 

@article{
author = "Milić, Mirjana M. and Matić, Vladimir M. and Lazarov, Nenad Đ.",
year = "2011",
abstract = "An extended ASYNNNI model, that beside nearest-neighbour and next-nearest neighbour O-O interactions in the basal plane also includes interactions between the three nearest oxygen atoms, is used to describe the statistics of CuO chain fragmentation and to calculate doping and T (c) in YBa2Cu3O6+x . Calculations were made by the Monte Carlo method employing the recently proposed charge transfer model that assumes only chains whose length is equal to, or exceeds, a characteristic (critical) length, l (cr) , can provide holes to the layers and contribute to doping p. The obtained p(x) is then combined with a universal T (c) versus p relation to yield T (c) (x) characteristics that correlate remarkably with those reported in recent experiments. The best coordination between theoretical and experimental T (c) (x) characteristics has been achieved for l (cr) = 2, implying that only isolated basal plane oxygen atoms (trivial chains) do not contribute holes to CuO2 layers.",
journal = "Central European Journal of Physics",
title = "The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model",
volume = "9",
number = "3",
pages = "690-697",
doi = "10.2478/s11534-010-0060-6"
}

Milić, M. M., Matić, V. M.,& Lazarov, N. Đ.. (2011). The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model. in Central European Journal of Physics, 9(3), 690-697.
https://doi.org/10.2478/s11534-010-0060-6

Milić MM, Matić VM, Lazarov NĐ. The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model. in Central European Journal of Physics. 2011;9(3):690-697.
doi:10.2478/s11534-010-0060-6 .

Milić, Mirjana M., Matić, Vladimir M., Lazarov, Nenad Đ., "The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model" in Central European Journal of Physics, 9, no. 3 (2011):690-697,
https://doi.org/10.2478/s11534-010-0060-6 . .

TY  - CONF
AU  - Milić, Mirjana M.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9333
AB  - In the present study experimental data available in the literature have been
employed to investigate behavior of the critical temperature Tc as a function of the
pressure P, in the YBa2Cu3O6+x high temperature superconductor (HTSC). We
estimated the maximal critical temperature Tc,max(P) which can be achieved in this
material under pressure applied at temperatures low enough to prevent oxygen
reordering. We found that it approximately equals to 114K corresponding to x ≈
0.77.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
T1  - Study on the dependence of the critical temperature Tc on pressure in YBa2Cu3O6+x
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9333
ER  - 

@conference{
author = "Milić, Mirjana M.",
year = "2010",
abstract = "In the present study experimental data available in the literature have been
employed to investigate behavior of the critical temperature Tc as a function of the
pressure P, in the YBa2Cu3O6+x high temperature superconductor (HTSC). We
estimated the maximal critical temperature Tc,max(P) which can be achieved in this
material under pressure applied at temperatures low enough to prevent oxygen
reordering. We found that it approximately equals to 114K corresponding to x ≈
0.77.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry",
title = "Study on the dependence of the critical temperature Tc on pressure in YBa2Cu3O6+x",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9333"
}

Milić, M. M.. (2010). Study on the dependence of the critical temperature Tc on pressure in YBa2Cu3O6+x. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia..
https://hdl.handle.net/21.15107/rcub_vinar_9333

Milić MM. Study on the dependence of the critical temperature Tc on pressure in YBa2Cu3O6+x. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry. 2010;.
https://hdl.handle.net/21.15107/rcub_vinar_9333 .

Milić, Mirjana M., "Study on the dependence of the critical temperature Tc on pressure in YBa2Cu3O6+x" in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry (2010),
https://hdl.handle.net/21.15107/rcub_vinar_9333 .

TY  - JOUR
AU  - Laad, M. S.
AU  - Bradarić, Ivica
AU  - Kusmartsev, F. V.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3376
AB  - We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how these exciting power-law observations are naturally described within a new, local (orbital) non-Fermi-liquid state arising from strong, multiorbital Coulomb interactions. Introducing a multiorbital, correlated model treated within the dynamical mean-field theory, we also find two distinct relaxation rates for relaxation of transport in complete agreement with experiment.
T2  - Physical Review Letters
T1  - Orbital non-Fermi-liquid behavior in cubic ruthenates
VL  - 100
IS  - 9
DO  - 10.1103/PhysRevLett.100.096402
ER  - 

@article{
author = "Laad, M. S. and Bradarić, Ivica and Kusmartsev, F. V.",
year = "2008",
abstract = "We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how these exciting power-law observations are naturally described within a new, local (orbital) non-Fermi-liquid state arising from strong, multiorbital Coulomb interactions. Introducing a multiorbital, correlated model treated within the dynamical mean-field theory, we also find two distinct relaxation rates for relaxation of transport in complete agreement with experiment.",
journal = "Physical Review Letters",
title = "Orbital non-Fermi-liquid behavior in cubic ruthenates",
volume = "100",
number = "9",
doi = "10.1103/PhysRevLett.100.096402"
}

Laad, M. S., Bradarić, I.,& Kusmartsev, F. V.. (2008). Orbital non-Fermi-liquid behavior in cubic ruthenates. in Physical Review Letters, 100(9).
https://doi.org/10.1103/PhysRevLett.100.096402

Laad MS, Bradarić I, Kusmartsev FV. Orbital non-Fermi-liquid behavior in cubic ruthenates. in Physical Review Letters. 2008;100(9).
doi:10.1103/PhysRevLett.100.096402 .

Laad, M. S., Bradarić, Ivica, Kusmartsev, F. V., "Orbital non-Fermi-liquid behavior in cubic ruthenates" in Physical Review Letters, 100, no. 9 (2008),
https://doi.org/10.1103/PhysRevLett.100.096402 . .

TY  - JOUR
AU  - Zorkovska, A.
AU  - Baran, A.
AU  - Feher, A.
AU  - Sebek, J.
AU  - Santava, E.
AU  - Bradarić, Ivica
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6715
AB  - Electrical resistance, transversal magnetoresistance and the Hall effect were studied on polycrystalline CaTixRu1-xO3 (x = 0, 0.07) samples using a conventional Quantum Design PPMS-9 equipment in the temperature range 2-300 K and magnetic field up to 9 T. Substantial differences were found between the two samples: (i) opposite to the metallic character of CaRuO3, the substituted sample has insulating-like electrical resistance; (ii) the magnetoresistance of the substituted sample changes the sign from negative to positive values with increasing temperature. The magnetoresistance of CaRuO3 is negative, the sign reversal is induced by magnetic field and only at temperatures below 15 K, such a behaviour is predicted for clustered systems; (iii) the Hall voltage in pure CaRuO3 also changes sign from negative to positive values above 35 K. This temperature coincides with the observed magnetic transition temperature, indicating that the magnetic state and the carrier character interrelate.
T2  - Acta Physica Polonica A
T1  - Magnetotransport properties of CaTixRu1-xO3 (x=0, 0.07)
VL  - 113
IS  - 1
SP  - 351
EP  - 354
DO  - 10.12693/APhysPolA.113.351
ER  - 

@article{
author = "Zorkovska, A. and Baran, A. and Feher, A. and Sebek, J. and Santava, E. and Bradarić, Ivica",
year = "2008",
abstract = "Electrical resistance, transversal magnetoresistance and the Hall effect were studied on polycrystalline CaTixRu1-xO3 (x = 0, 0.07) samples using a conventional Quantum Design PPMS-9 equipment in the temperature range 2-300 K and magnetic field up to 9 T. Substantial differences were found between the two samples: (i) opposite to the metallic character of CaRuO3, the substituted sample has insulating-like electrical resistance; (ii) the magnetoresistance of the substituted sample changes the sign from negative to positive values with increasing temperature. The magnetoresistance of CaRuO3 is negative, the sign reversal is induced by magnetic field and only at temperatures below 15 K, such a behaviour is predicted for clustered systems; (iii) the Hall voltage in pure CaRuO3 also changes sign from negative to positive values above 35 K. This temperature coincides with the observed magnetic transition temperature, indicating that the magnetic state and the carrier character interrelate.",
journal = "Acta Physica Polonica A",
title = "Magnetotransport properties of CaTixRu1-xO3 (x=0, 0.07)",
volume = "113",
number = "1",
pages = "351-354",
doi = "10.12693/APhysPolA.113.351"
}

Zorkovska, A., Baran, A., Feher, A., Sebek, J., Santava, E.,& Bradarić, I.. (2008). Magnetotransport properties of CaTixRu1-xO3 (x=0, 0.07). in Acta Physica Polonica A, 113(1), 351-354.
https://doi.org/10.12693/APhysPolA.113.351

Zorkovska A, Baran A, Feher A, Sebek J, Santava E, Bradarić I. Magnetotransport properties of CaTixRu1-xO3 (x=0, 0.07). in Acta Physica Polonica A. 2008;113(1):351-354.
doi:10.12693/APhysPolA.113.351 .

Zorkovska, A., Baran, A., Feher, A., Sebek, J., Santava, E., Bradarić, Ivica, "Magnetotransport properties of CaTixRu1-xO3 (x=0, 0.07)" in Acta Physica Polonica A, 113, no. 1 (2008):351-354,
https://doi.org/10.12693/APhysPolA.113.351 . .

TY  - JOUR
AU  - Zorkovska, A.
AU  - Baran, A.
AU  - Kajnakova, M.
AU  - Feher, A.
AU  - Sebek, J.
AU  - Santava, E.
AU  - Bradarić, Ivica
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6716
AB  - The influence of Ti substitution on the specific heat of the CaTixRu1-xO3 system at low concentrations x = 0, 0.005, and 0.03 was studied in the temperature range of 2-300 K at magnetic fields tip to 9 T. Small peak was revealed in the C/T vs. T-2 dependence at around 3 K, which are field sensitive (the electronic specific heat coefficient gamma linearly decreases with the increase in magnetic field), and might be connected to some kind of magnetic ordering. The coefficient gamma is suppressed also by Ti substitution.
T2  - Acta Physica Polonica A
T1  - Ti-induced ferromagnetism and the specific heat of CaTixRu1-xO3 (x=0, 0.005, 0.03)
VL  - 113
IS  - 1
SP  - 355
EP  - 358
DO  - 10.12693/APhysPolA.113.355
ER  - 

@article{
author = "Zorkovska, A. and Baran, A. and Kajnakova, M. and Feher, A. and Sebek, J. and Santava, E. and Bradarić, Ivica",
year = "2008",
abstract = "The influence of Ti substitution on the specific heat of the CaTixRu1-xO3 system at low concentrations x = 0, 0.005, and 0.03 was studied in the temperature range of 2-300 K at magnetic fields tip to 9 T. Small peak was revealed in the C/T vs. T-2 dependence at around 3 K, which are field sensitive (the electronic specific heat coefficient gamma linearly decreases with the increase in magnetic field), and might be connected to some kind of magnetic ordering. The coefficient gamma is suppressed also by Ti substitution.",
journal = "Acta Physica Polonica A",
title = "Ti-induced ferromagnetism and the specific heat of CaTixRu1-xO3 (x=0, 0.005, 0.03)",
volume = "113",
number = "1",
pages = "355-358",
doi = "10.12693/APhysPolA.113.355"
}

Zorkovska, A., Baran, A., Kajnakova, M., Feher, A., Sebek, J., Santava, E.,& Bradarić, I.. (2008). Ti-induced ferromagnetism and the specific heat of CaTixRu1-xO3 (x=0, 0.005, 0.03). in Acta Physica Polonica A, 113(1), 355-358.
https://doi.org/10.12693/APhysPolA.113.355

Zorkovska A, Baran A, Kajnakova M, Feher A, Sebek J, Santava E, Bradarić I. Ti-induced ferromagnetism and the specific heat of CaTixRu1-xO3 (x=0, 0.005, 0.03). in Acta Physica Polonica A. 2008;113(1):355-358.
doi:10.12693/APhysPolA.113.355 .

Zorkovska, A., Baran, A., Kajnakova, M., Feher, A., Sebek, J., Santava, E., Bradarić, Ivica, "Ti-induced ferromagnetism and the specific heat of CaTixRu1-xO3 (x=0, 0.005, 0.03)" in Acta Physica Polonica A, 113, no. 1 (2008):355-358,
https://doi.org/10.12693/APhysPolA.113.355 . .

TY  - JOUR
AU  - Baran, A.
AU  - Zorkovska, A.
AU  - Feher, A.
AU  - Sebek, J.
AU  - Santava, E.
AU  - Hejtmanek, J.
AU  - Veverka, M.
AU  - Bradarić, Ivica
AU  - Ruzicka, M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6717
AB  - We present a comparative study of Na0.7CoO2 samples obtained from three different sources and prepared by different methods. The specific heat and magnetic susceptibility measurements in the temperature range 2-300 K show substantial influence on the observed anomalies, which underlines that the system is extremely sensitive to preparation protocols.
T2  - Acta Physica Polonica A
T1  - Low temperature anomalies in the specific heat and magnetic susceptibility of Na0.7CoO2 samples
VL  - 113
IS  - 1
SP  - 495
EP  - 498
DO  - 10.12693/APhysPolA.113.495
ER  - 

@article{
author = "Baran, A. and Zorkovska, A. and Feher, A. and Sebek, J. and Santava, E. and Hejtmanek, J. and Veverka, M. and Bradarić, Ivica and Ruzicka, M.",
year = "2008",
abstract = "We present a comparative study of Na0.7CoO2 samples obtained from three different sources and prepared by different methods. The specific heat and magnetic susceptibility measurements in the temperature range 2-300 K show substantial influence on the observed anomalies, which underlines that the system is extremely sensitive to preparation protocols.",
journal = "Acta Physica Polonica A",
title = "Low temperature anomalies in the specific heat and magnetic susceptibility of Na0.7CoO2 samples",
volume = "113",
number = "1",
pages = "495-498",
doi = "10.12693/APhysPolA.113.495"
}

Baran, A., Zorkovska, A., Feher, A., Sebek, J., Santava, E., Hejtmanek, J., Veverka, M., Bradarić, I.,& Ruzicka, M.. (2008). Low temperature anomalies in the specific heat and magnetic susceptibility of Na0.7CoO2 samples. in Acta Physica Polonica A, 113(1), 495-498.
https://doi.org/10.12693/APhysPolA.113.495

Baran A, Zorkovska A, Feher A, Sebek J, Santava E, Hejtmanek J, Veverka M, Bradarić I, Ruzicka M. Low temperature anomalies in the specific heat and magnetic susceptibility of Na0.7CoO2 samples. in Acta Physica Polonica A. 2008;113(1):495-498.
doi:10.12693/APhysPolA.113.495 .

Baran, A., Zorkovska, A., Feher, A., Sebek, J., Santava, E., Hejtmanek, J., Veverka, M., Bradarić, Ivica, Ruzicka, M., "Low temperature anomalies in the specific heat and magnetic susceptibility of Na0.7CoO2 samples" in Acta Physica Polonica A, 113, no. 1 (2008):495-498,
https://doi.org/10.12693/APhysPolA.113.495 . .

TY  - JOUR
AU  - Milić, Mirjana M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3393
AB  - An expression for the chain length probability distribution p(l) of a one dimensional Ising chain was derived using the cluster variation method formalism, the p(l) being expressed through the pair cluster probabilities. It was shown numerically that the same expression also applies in the case of one dimensional chains formed along one of the next-nearest neighbor interactions included in the two dimensional ASYNNNI (Asymmetric Next-Nearest Neighbor Ising) model, widely used to describe the statistics of oxygen ordering in the basal CuO (x) planes of the YBa(2)Cu(3)O(6+x) type high-T (c) superconducting materials. Equivalency between ASYNNNI and 1d Ising model is discussed.
T2  - Central European Journal of Physics
T1  - Chain length probability distribution - equivalence of ASYNNNI and 1d Ising model
VL  - 6
IS  - 2
SP  - 311
EP  - 316
DO  - 10.2478/s11534-008-0054-9
ER  - 

@article{
author = "Milić, Mirjana M.",
year = "2008",
abstract = "An expression for the chain length probability distribution p(l) of a one dimensional Ising chain was derived using the cluster variation method formalism, the p(l) being expressed through the pair cluster probabilities. It was shown numerically that the same expression also applies in the case of one dimensional chains formed along one of the next-nearest neighbor interactions included in the two dimensional ASYNNNI (Asymmetric Next-Nearest Neighbor Ising) model, widely used to describe the statistics of oxygen ordering in the basal CuO (x) planes of the YBa(2)Cu(3)O(6+x) type high-T (c) superconducting materials. Equivalency between ASYNNNI and 1d Ising model is discussed.",
journal = "Central European Journal of Physics",
title = "Chain length probability distribution - equivalence of ASYNNNI and 1d Ising model",
volume = "6",
number = "2",
pages = "311-316",
doi = "10.2478/s11534-008-0054-9"
}

Milić, M. M.. (2008). Chain length probability distribution - equivalence of ASYNNNI and 1d Ising model. in Central European Journal of Physics, 6(2), 311-316.
https://doi.org/10.2478/s11534-008-0054-9

Milić MM. Chain length probability distribution - equivalence of ASYNNNI and 1d Ising model. in Central European Journal of Physics. 2008;6(2):311-316.
doi:10.2478/s11534-008-0054-9 .

Milić, Mirjana M., "Chain length probability distribution - equivalence of ASYNNNI and 1d Ising model" in Central European Journal of Physics, 6, no. 2 (2008):311-316,
https://doi.org/10.2478/s11534-008-0054-9 . .

TY  - JOUR
AU  - Matić, Vladimir M.
AU  - Lazarov, Nenad Đ.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3195
AB  - A model of charge transfer mechanism from CuO chains to CuO2 planes has been proposed to account for doping of the planes, assuming that only chains containing more than three oxygen atoms can contribute to hole transfer. Only chains with l GT 4 are assumed to have transferred a certain fraction, approximately 40%, of the holes created by oxygen added to the chain beyond the first three oxygen atoms. Using the so obtained x dependence of doping, p(x), at constant (room) temperature and utilizing empirical parabolic phase relation T,(p) (T-c(P) = T-c,max[1 - 82.6(p(x) - 0.16)(2)]), the T-c versus x dependence is found to have two clearly distinguished plateaus at 60 and 90 K, remarkably fitting to experimental Tc(x). The effect of statistics of CuO chain fragmentation has been included by applying cluster variation method to two dimensional asymmetric next-nearest-neighbor Ising model that is employed to describe oxygen-chain ordering in basal planes. The obtained results indicate that plateaus, coinciding with T(c)(x) = 0, emerge either when p(x) = 0 (p(x) approximate to const), in the region of OH phase formation (the 60 K plateau), or when p = 0.16, representing the optimal doping at x approximate to 0.91 in OII phase (the 90 K plateau). (c) 2007 Elsevier Ltd. All rights reserved.
T2  - Solid State Communications
T1  - Impact of chain fragmentation on charge transfer scenario and two-plateaus-like behavior of T-c(x) in YBa2Cu3O6+x
VL  - 142
IS  - 3
SP  - 165
EP  - 168
DO  - 10.1016/j.ssc.2007.01.041
ER  - 

@article{
author = "Matić, Vladimir M. and Lazarov, Nenad Đ.",
year = "2007",
abstract = "A model of charge transfer mechanism from CuO chains to CuO2 planes has been proposed to account for doping of the planes, assuming that only chains containing more than three oxygen atoms can contribute to hole transfer. Only chains with l GT 4 are assumed to have transferred a certain fraction, approximately 40%, of the holes created by oxygen added to the chain beyond the first three oxygen atoms. Using the so obtained x dependence of doping, p(x), at constant (room) temperature and utilizing empirical parabolic phase relation T,(p) (T-c(P) = T-c,max[1 - 82.6(p(x) - 0.16)(2)]), the T-c versus x dependence is found to have two clearly distinguished plateaus at 60 and 90 K, remarkably fitting to experimental Tc(x). The effect of statistics of CuO chain fragmentation has been included by applying cluster variation method to two dimensional asymmetric next-nearest-neighbor Ising model that is employed to describe oxygen-chain ordering in basal planes. The obtained results indicate that plateaus, coinciding with T(c)(x) = 0, emerge either when p(x) = 0 (p(x) approximate to const), in the region of OH phase formation (the 60 K plateau), or when p = 0.16, representing the optimal doping at x approximate to 0.91 in OII phase (the 90 K plateau). (c) 2007 Elsevier Ltd. All rights reserved.",
journal = "Solid State Communications",
title = "Impact of chain fragmentation on charge transfer scenario and two-plateaus-like behavior of T-c(x) in YBa2Cu3O6+x",
volume = "142",
number = "3",
pages = "165-168",
doi = "10.1016/j.ssc.2007.01.041"
}

Matić, V. M.,& Lazarov, N. Đ.. (2007). Impact of chain fragmentation on charge transfer scenario and two-plateaus-like behavior of T-c(x) in YBa2Cu3O6+x. in Solid State Communications, 142(3), 165-168.
https://doi.org/10.1016/j.ssc.2007.01.041

Matić VM, Lazarov NĐ. Impact of chain fragmentation on charge transfer scenario and two-plateaus-like behavior of T-c(x) in YBa2Cu3O6+x. in Solid State Communications. 2007;142(3):165-168.
doi:10.1016/j.ssc.2007.01.041 .

Matić, Vladimir M., Lazarov, Nenad Đ., "Impact of chain fragmentation on charge transfer scenario and two-plateaus-like behavior of T-c(x) in YBa2Cu3O6+x" in Solid State Communications, 142, no. 3 (2007):165-168,
https://doi.org/10.1016/j.ssc.2007.01.041 . .

TY  - JOUR
AU  - Milić, Mirjana M.
AU  - Lazarov, Nenad Đ.
AU  - Matić, Vladimir M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6702
AB  - According to the charge transfer model of Kudinov et a]. the photoinduced enhancement of conductivity in YBa2Cu3O6+x material can be explained by the photoexcitation of electron-hole pairs, and the subsequent transfer of electrons to the oxygen deficient CuOx planes where they become trapped in the CuO chain fragments, while the holes remain free in the superconducting CUO2 planes contributing to the superconducting current. In this paper we have employed the numerical cluster variation method (CVM) and the recently established relation between chain probability distribution p(n) and the average chain length n(av), to calculate the number of electrons being captured in the unoccupied p orbitals of O- ions incorporated in the CuO chains, thus producing the free holes in the CUO2 planes. Our results support the standing that several processes make contribution to the effects of persistent photoconductivity and photoinduced superconductivity. (C) 2007 Elsevier B.V. All rights reserved.
T2  - Physica. C: Superconductivity and Its Applications
T1  - Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material
VL  - 460
SP  - 364
EP  - 365
DO  - 10.1016/j.physc.2007.03.051
ER  - 

@article{
author = "Milić, Mirjana M. and Lazarov, Nenad Đ. and Matić, Vladimir M.",
year = "2007",
abstract = "According to the charge transfer model of Kudinov et a]. the photoinduced enhancement of conductivity in YBa2Cu3O6+x material can be explained by the photoexcitation of electron-hole pairs, and the subsequent transfer of electrons to the oxygen deficient CuOx planes where they become trapped in the CuO chain fragments, while the holes remain free in the superconducting CUO2 planes contributing to the superconducting current. In this paper we have employed the numerical cluster variation method (CVM) and the recently established relation between chain probability distribution p(n) and the average chain length n(av), to calculate the number of electrons being captured in the unoccupied p orbitals of O- ions incorporated in the CuO chains, thus producing the free holes in the CUO2 planes. Our results support the standing that several processes make contribution to the effects of persistent photoconductivity and photoinduced superconductivity. (C) 2007 Elsevier B.V. All rights reserved.",
journal = "Physica. C: Superconductivity and Its Applications",
title = "Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material",
volume = "460",
pages = "364-365",
doi = "10.1016/j.physc.2007.03.051"
}

Milić, M. M., Lazarov, N. Đ.,& Matić, V. M.. (2007). Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material. in Physica. C: Superconductivity and Its Applications, 460, 364-365.
https://doi.org/10.1016/j.physc.2007.03.051

Milić MM, Lazarov NĐ, Matić VM. Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material. in Physica. C: Superconductivity and Its Applications. 2007;460:364-365.
doi:10.1016/j.physc.2007.03.051 .

Milić, Mirjana M., Lazarov, Nenad Đ., Matić, Vladimir M., "Cluster variation method investigation of photoinduced charge transfer in YBa2Cu3O6+x material" in Physica. C: Superconductivity and Its Applications, 460 (2007):364-365,
https://doi.org/10.1016/j.physc.2007.03.051 . .

TY  - JOUR
AU  - Matić, Vladimir M.
AU  - Lazarov, Nenad Đ.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3061
AB  - Statistics of CuO chains in basal planes of YBa2Cu3O6+x high-T-c superconductor has been studied in terms of two dimensional asymmetric next-to-nearest-neighbor Ising (ASYNNNI) model, with accentuation on distribution of CuO, chains per different chain lengths. It has been shown that the fraction p(1) of CuO chains containing l oxygen ions (i.e., having the length equal to l), satisfies so-called law of geometric distribution p(l) = w(1-w)(l-1), where the quantity w is equal to the inverse of average chain length l(av) in the system, for given values of oxygen content x and temperature T. In the case of ortho-II (OII) structural phase, the geometric chain probability distribution is shown to hold separately for each of two different sublattices of oxygen sites, commonly known as alpha(1), and alpha(2), with respectively defined l(av)(alpha 1)(x, T) and l(av)(alpha 2)(x, T). The theoretically derived result of the chain probability distribution p(l) is shown to be in a remarkable agreement with the results obtained out of extensive Monte Carlo calculations that were made within region of stability of orthorhombic structural phases in (x, 7) space. The relevance of chain length distribution for accurate count of the number of transferred electronic holes to superconducting CuO2 layers has been pointed out and expression for hole concentration has been derived. The concept of critical chain length for charge transfer mechanism was briefly discussed. (c) 2006 Elsevier B.V. All rights reserved.
T2  - Physica. C: Superconductivity and Its Applications
T1  - Geometric distribution of CuO chains in YBa2Cu3O6+x
VL  - 443
IS  - 1-2
SP  - 49
EP  - 56
DO  - 10.1016/j.physc.2006.04.094
ER  - 

@article{
author = "Matić, Vladimir M. and Lazarov, Nenad Đ.",
year = "2006",
abstract = "Statistics of CuO chains in basal planes of YBa2Cu3O6+x high-T-c superconductor has been studied in terms of two dimensional asymmetric next-to-nearest-neighbor Ising (ASYNNNI) model, with accentuation on distribution of CuO, chains per different chain lengths. It has been shown that the fraction p(1) of CuO chains containing l oxygen ions (i.e., having the length equal to l), satisfies so-called law of geometric distribution p(l) = w(1-w)(l-1), where the quantity w is equal to the inverse of average chain length l(av) in the system, for given values of oxygen content x and temperature T. In the case of ortho-II (OII) structural phase, the geometric chain probability distribution is shown to hold separately for each of two different sublattices of oxygen sites, commonly known as alpha(1), and alpha(2), with respectively defined l(av)(alpha 1)(x, T) and l(av)(alpha 2)(x, T). The theoretically derived result of the chain probability distribution p(l) is shown to be in a remarkable agreement with the results obtained out of extensive Monte Carlo calculations that were made within region of stability of orthorhombic structural phases in (x, 7) space. The relevance of chain length distribution for accurate count of the number of transferred electronic holes to superconducting CuO2 layers has been pointed out and expression for hole concentration has been derived. The concept of critical chain length for charge transfer mechanism was briefly discussed. (c) 2006 Elsevier B.V. All rights reserved.",
journal = "Physica. C: Superconductivity and Its Applications",
title = "Geometric distribution of CuO chains in YBa2Cu3O6+x",
volume = "443",
number = "1-2",
pages = "49-56",
doi = "10.1016/j.physc.2006.04.094"
}

Matić, V. M.,& Lazarov, N. Đ.. (2006). Geometric distribution of CuO chains in YBa2Cu3O6+x. in Physica. C: Superconductivity and Its Applications, 443(1-2), 49-56.
https://doi.org/10.1016/j.physc.2006.04.094

Matić VM, Lazarov NĐ. Geometric distribution of CuO chains in YBa2Cu3O6+x. in Physica. C: Superconductivity and Its Applications. 2006;443(1-2):49-56.
doi:10.1016/j.physc.2006.04.094 .

Matić, Vladimir M., Lazarov, Nenad Đ., "Geometric distribution of CuO chains in YBa2Cu3O6+x" in Physica. C: Superconductivity and Its Applications, 443, no. 1-2 (2006):49-56,
https://doi.org/10.1016/j.physc.2006.04.094 . .