The dependence of critical temperature on oxygen concentration in YBa2Cu3O6+x in terms of the fragmented chain model
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.
Keywords:
superconductivity / charge transfer / CuO chainsSource:
Central European Journal of Physics, 2011, 9, 3, 690-697Funding / projects:
- Superprovodnost, magnetizam i fluktuacione pojave (RS-MESTD-MPN2006-2010-141014)
DOI: 10.2478/s11534-010-0060-6
ISSN: 1895-1082
WoS: 000287747900009
Scopus: 2-s2.0-79952105769
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Institution/Community
VinčaTY - 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 . .