TY  - JOUR
AU  - Radisavljević, Ivana
AU  - Novaković, Nikola
AU  - Mahnke, Heinz-Eberhard
AU  - Andrić, Velibor
AU  - Kurko, Sandra V.
AU  - Milivojević, Dušan
AU  - Romčević, Nebojša Ž.
AU  - Ivanović, Nenad
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8004
AB  - Paper presents detailed studies of local and electronic structure around Fe in Cd0.97Fe0.03Te, Cd0.98Fe0.02Te0.97Se0.03 and Cd0.99Fe0.01Te0.91S0.09 multinary chalcogenides by means of X–ray absorption fine structure (XAFS), X–ray magnetic circular dichroism (XMCD) and electron paramagnetic resonance (EPR) measurements. In addition, electronic consequences of Fe incorporation into CdTe semiconductor host were studied by means of first principles calculations. In order to improve accuracy of the calculated total energies, the band gaps and the band edge positions, special attention is paid to the treatment of exchange–correlation interaction and the description of highly localized Fe 3d–states. Also, the Bader theory of the topological properties of the electron charge density is used to access details of the nature, strength and distribution of the (next) nearest neighbour bonds. Local and electronic structure around Fe in Cd0.97Fe0.03Te and Cd0.98Fe0.02Te0.97Se0.03 systems have been found to exhibit similar characteristics, since the first coordination sphere around Fe comprises four Te atoms located at approximately the same distance. In Cd0.99Fe0.01Te0.91S0.09 system, however, local bimodal distribution of distances has been revealed, with one Fe–Te bond replaced with much shorter Fe–S bond, resulting in much stronger crystal–field. Along with the crystal field effect, the spin–orbit interaction has proven to play decisive role in determining the nature of Fe doped CdTe systems. While the systems with higher Fe concentrations (25 at.%) are intrinsic insulators, in systems with only 3.125 at.% Fe one spin channel contributes to the density of states at the Fermi level, which makes them suitable for spin selective electronic transport applications. © 2018 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Survey of electronic properties and local structures around Fe in selected multinary chalcogenides
VL  - 782
SP  - 160
EP  - 169
DO  - 10.1016/j.jallcom.2018.12.167
ER  - 

@article{
author = "Radisavljević, Ivana and Novaković, Nikola and Mahnke, Heinz-Eberhard and Andrić, Velibor and Kurko, Sandra V. and Milivojević, Dušan and Romčević, Nebojša Ž. and Ivanović, Nenad",
year = "2019",
abstract = "Paper presents detailed studies of local and electronic structure around Fe in Cd0.97Fe0.03Te, Cd0.98Fe0.02Te0.97Se0.03 and Cd0.99Fe0.01Te0.91S0.09 multinary chalcogenides by means of X–ray absorption fine structure (XAFS), X–ray magnetic circular dichroism (XMCD) and electron paramagnetic resonance (EPR) measurements. In addition, electronic consequences of Fe incorporation into CdTe semiconductor host were studied by means of first principles calculations. In order to improve accuracy of the calculated total energies, the band gaps and the band edge positions, special attention is paid to the treatment of exchange–correlation interaction and the description of highly localized Fe 3d–states. Also, the Bader theory of the topological properties of the electron charge density is used to access details of the nature, strength and distribution of the (next) nearest neighbour bonds. Local and electronic structure around Fe in Cd0.97Fe0.03Te and Cd0.98Fe0.02Te0.97Se0.03 systems have been found to exhibit similar characteristics, since the first coordination sphere around Fe comprises four Te atoms located at approximately the same distance. In Cd0.99Fe0.01Te0.91S0.09 system, however, local bimodal distribution of distances has been revealed, with one Fe–Te bond replaced with much shorter Fe–S bond, resulting in much stronger crystal–field. Along with the crystal field effect, the spin–orbit interaction has proven to play decisive role in determining the nature of Fe doped CdTe systems. While the systems with higher Fe concentrations (25 at.%) are intrinsic insulators, in systems with only 3.125 at.% Fe one spin channel contributes to the density of states at the Fermi level, which makes them suitable for spin selective electronic transport applications. © 2018 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Survey of electronic properties and local structures around Fe in selected multinary chalcogenides",
volume = "782",
pages = "160-169",
doi = "10.1016/j.jallcom.2018.12.167"
}

Radisavljević, I., Novaković, N., Mahnke, H., Andrić, V., Kurko, S. V., Milivojević, D., Romčević, N. Ž.,& Ivanović, N.. (2019). Survey of electronic properties and local structures around Fe in selected multinary chalcogenides. in Journal of Alloys and Compounds, 782, 160-169.
https://doi.org/10.1016/j.jallcom.2018.12.167

Radisavljević I, Novaković N, Mahnke H, Andrić V, Kurko SV, Milivojević D, Romčević NŽ, Ivanović N. Survey of electronic properties and local structures around Fe in selected multinary chalcogenides. in Journal of Alloys and Compounds. 2019;782:160-169.
doi:10.1016/j.jallcom.2018.12.167 .

Radisavljević, Ivana, Novaković, Nikola, Mahnke, Heinz-Eberhard, Andrić, Velibor, Kurko, Sandra V., Milivojević, Dušan, Romčević, Nebojša Ž., Ivanović, Nenad, "Survey of electronic properties and local structures around Fe in selected multinary chalcogenides" in Journal of Alloys and Compounds, 782 (2019):160-169,
https://doi.org/10.1016/j.jallcom.2018.12.167 . .

TY  - JOUR
AU  - Radisavljević, Ivana
AU  - Novaković, Nikola
AU  - Matović, Branko
AU  - Paunović, Novica M.
AU  - Medić, Mirjana
AU  - Bundaleski, Nenad
AU  - Andrić, Velibor
AU  - Teodoro, Orlando M. N. D.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/881
AB  - X-ray absorption (XANES, EXAFS, XMCD) and photoelectron (XPS) spectroscopic techniques were employed to study local structural, electronic and magnetic properties of Zn0.95Co0.05O nanopowders. The substitutional Co2+ ions are incorporated in ZnO lattice at regular Zn sites and the sample is characterized by high structural order. There was no sign of ferromagnetic ordering of Co magnetic moments and the sample is in paramagnetic state at all temperatures down to 5 K. The possible connection of the structural defects with the absence of ferromagnetism is discussed on the basis of theoretical calculations of the O K-edge absorption spectra. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Materials Research Bulletin
T1  - Comprehensive studies of structural, electronic and magnetic properties of Zn(0.9)5Co(0.05)O nanopowders
VL  - 74
SP  - 78
EP  - 84
DO  - 10.1016/j.materresbull.2015.10.014
ER  - 

@article{
author = "Radisavljević, Ivana and Novaković, Nikola and Matović, Branko and Paunović, Novica M. and Medić, Mirjana and Bundaleski, Nenad and Andrić, Velibor and Teodoro, Orlando M. N. D.",
year = "2016",
abstract = "X-ray absorption (XANES, EXAFS, XMCD) and photoelectron (XPS) spectroscopic techniques were employed to study local structural, electronic and magnetic properties of Zn0.95Co0.05O nanopowders. The substitutional Co2+ ions are incorporated in ZnO lattice at regular Zn sites and the sample is characterized by high structural order. There was no sign of ferromagnetic ordering of Co magnetic moments and the sample is in paramagnetic state at all temperatures down to 5 K. The possible connection of the structural defects with the absence of ferromagnetism is discussed on the basis of theoretical calculations of the O K-edge absorption spectra. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Materials Research Bulletin",
title = "Comprehensive studies of structural, electronic and magnetic properties of Zn(0.9)5Co(0.05)O nanopowders",
volume = "74",
pages = "78-84",
doi = "10.1016/j.materresbull.2015.10.014"
}

Radisavljević, I., Novaković, N., Matović, B., Paunović, N. M., Medić, M., Bundaleski, N., Andrić, V.,& Teodoro, O. M. N. D.. (2016). Comprehensive studies of structural, electronic and magnetic properties of Zn(0.9)5Co(0.05)O nanopowders. in Materials Research Bulletin
Elsevier., 74, 78-84.
https://doi.org/10.1016/j.materresbull.2015.10.014

Radisavljević I, Novaković N, Matović B, Paunović NM, Medić M, Bundaleski N, Andrić V, Teodoro OMND. Comprehensive studies of structural, electronic and magnetic properties of Zn(0.9)5Co(0.05)O nanopowders. in Materials Research Bulletin. 2016;74:78-84.
doi:10.1016/j.materresbull.2015.10.014 .

Radisavljević, Ivana, Novaković, Nikola, Matović, Branko, Paunović, Novica M., Medić, Mirjana, Bundaleski, Nenad, Andrić, Velibor, Teodoro, Orlando M. N. D., "Comprehensive studies of structural, electronic and magnetic properties of Zn(0.9)5Co(0.05)O nanopowders" in Materials Research Bulletin, 74 (2016):78-84,
https://doi.org/10.1016/j.materresbull.2015.10.014 . .

TY  - JOUR
AU  - Radisavljević, Ivana
AU  - Novaković, Nikola
AU  - Romčević, Nebojša Ž.
AU  - Mitrić, Miodrag
AU  - Kuzmanović, Bojana
AU  - Bojanić, Slobodan
AU  - Ivanović, Nenad
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/840
AB  - Local electronic and structural features around Mn in Cd1-xMnxTe0.97Se0.03 (x = 0.02; 0.05; 0.1; y = 0.03) were studied by means of X-ray Absorption Fine Structure (XAFS) techniques. Manganese ions with an average valence 2+, are found to be well incorporated into the host CdTe lattice, with clear preference for Te atoms as the first neighbors. However, Mn and Te are found to form two essentially different types of bonds, one short, strong and directional (cubic MnTe-alike bond), and three much longer, predominantly ionic in nature (hexagonal MnTe-alike bonds), thereby distorting the tetrahedral coordination around Mn. The origin of peculiar Mn Te bonds distribution and details of their nature and strength are further elaborated by employing the first principle electronic structure calculations. That way a thorough insight in impact of the Mn Te bond length variation on the electronic structure of the compound is obtained. The relations established between the local structures and electronic properties offer a reliable procedure for detailed analysis of the structural and electronic consequences of the 3d-transition metals (TM) incorporation in II-VI semiconductor host. Clear distinction between various influences makes the procedure easily adoptable also to the studies of TM impurities in other semiconductors. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - Electronic aspects of formation and properties of local structures around Mn in Cd1-xMnxTe1-ySey
VL  - 167
SP  - 236
EP  - 245
DO  - 10.1016/j.matchemphys.2015.10.038
ER  - 

@article{
author = "Radisavljević, Ivana and Novaković, Nikola and Romčević, Nebojša Ž. and Mitrić, Miodrag and Kuzmanović, Bojana and Bojanić, Slobodan and Ivanović, Nenad",
year = "2015",
abstract = "Local electronic and structural features around Mn in Cd1-xMnxTe0.97Se0.03 (x = 0.02; 0.05; 0.1; y = 0.03) were studied by means of X-ray Absorption Fine Structure (XAFS) techniques. Manganese ions with an average valence 2+, are found to be well incorporated into the host CdTe lattice, with clear preference for Te atoms as the first neighbors. However, Mn and Te are found to form two essentially different types of bonds, one short, strong and directional (cubic MnTe-alike bond), and three much longer, predominantly ionic in nature (hexagonal MnTe-alike bonds), thereby distorting the tetrahedral coordination around Mn. The origin of peculiar Mn Te bonds distribution and details of their nature and strength are further elaborated by employing the first principle electronic structure calculations. That way a thorough insight in impact of the Mn Te bond length variation on the electronic structure of the compound is obtained. The relations established between the local structures and electronic properties offer a reliable procedure for detailed analysis of the structural and electronic consequences of the 3d-transition metals (TM) incorporation in II-VI semiconductor host. Clear distinction between various influences makes the procedure easily adoptable also to the studies of TM impurities in other semiconductors. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "Electronic aspects of formation and properties of local structures around Mn in Cd1-xMnxTe1-ySey",
volume = "167",
pages = "236-245",
doi = "10.1016/j.matchemphys.2015.10.038"
}

Radisavljević, I., Novaković, N., Romčević, N. Ž., Mitrić, M., Kuzmanović, B., Bojanić, S.,& Ivanović, N.. (2015). Electronic aspects of formation and properties of local structures around Mn in Cd1-xMnxTe1-ySey. in Materials Chemistry and Physics
Elsevier., 167, 236-245.
https://doi.org/10.1016/j.matchemphys.2015.10.038

Radisavljević I, Novaković N, Romčević NŽ, Mitrić M, Kuzmanović B, Bojanić S, Ivanović N. Electronic aspects of formation and properties of local structures around Mn in Cd1-xMnxTe1-ySey. in Materials Chemistry and Physics. 2015;167:236-245.
doi:10.1016/j.matchemphys.2015.10.038 .

Radisavljević, Ivana, Novaković, Nikola, Romčević, Nebojša Ž., Mitrić, Miodrag, Kuzmanović, Bojana, Bojanić, Slobodan, Ivanović, Nenad, "Electronic aspects of formation and properties of local structures around Mn in Cd1-xMnxTe1-ySey" in Materials Chemistry and Physics, 167 (2015):236-245,
https://doi.org/10.1016/j.matchemphys.2015.10.038 . .

TY  - JOUR
AU  - Radisavljević, Ivana
AU  - Trigueiro, J.
AU  - Bundaleski, Nenad
AU  - Medić, Mirjana
AU  - Romčević, Nebojša Ž.
AU  - Teodoro, Orlando M. N. D.
AU  - Mitrić, Miodrag
AU  - Ivanović, Nenad
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/425
AB  - Local structures and electronic properties of II-VI quaternary Zn0.98Fe0.02Te0.91Se0.09 mixed crystal are studied by X-ray absorption fine structure (XAFS) while the surface composition and its oxidation in air are studied by X-ray photoelectron spectroscopy (XPS). That way the surface stability and its modification with respect to the bulk are elucidated. The effects of surface oxidation on rearrangement and segregation of constituent atomic species at the surface are revealed and possible mechanisms of oxygen adsorption are discussed. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - XAFS and XPS analysis of Zn0.98Fe0.02Te0.91Se0.09 semiconductor
VL  - 632
SP  - 17
EP  - 22
DO  - 10.1016/j.jallcom.2015.01.169
ER  - 

@article{
author = "Radisavljević, Ivana and Trigueiro, J. and Bundaleski, Nenad and Medić, Mirjana and Romčević, Nebojša Ž. and Teodoro, Orlando M. N. D. and Mitrić, Miodrag and Ivanović, Nenad",
year = "2015",
abstract = "Local structures and electronic properties of II-VI quaternary Zn0.98Fe0.02Te0.91Se0.09 mixed crystal are studied by X-ray absorption fine structure (XAFS) while the surface composition and its oxidation in air are studied by X-ray photoelectron spectroscopy (XPS). That way the surface stability and its modification with respect to the bulk are elucidated. The effects of surface oxidation on rearrangement and segregation of constituent atomic species at the surface are revealed and possible mechanisms of oxygen adsorption are discussed. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "XAFS and XPS analysis of Zn0.98Fe0.02Te0.91Se0.09 semiconductor",
volume = "632",
pages = "17-22",
doi = "10.1016/j.jallcom.2015.01.169"
}

Radisavljević, I., Trigueiro, J., Bundaleski, N., Medić, M., Romčević, N. Ž., Teodoro, O. M. N. D., Mitrić, M.,& Ivanović, N.. (2015). XAFS and XPS analysis of Zn0.98Fe0.02Te0.91Se0.09 semiconductor. in Journal of Alloys and Compounds, 632, 17-22.
https://doi.org/10.1016/j.jallcom.2015.01.169

Radisavljević I, Trigueiro J, Bundaleski N, Medić M, Romčević NŽ, Teodoro OMND, Mitrić M, Ivanović N. XAFS and XPS analysis of Zn0.98Fe0.02Te0.91Se0.09 semiconductor. in Journal of Alloys and Compounds. 2015;632:17-22.
doi:10.1016/j.jallcom.2015.01.169 .

Radisavljević, Ivana, Trigueiro, J., Bundaleski, Nenad, Medić, Mirjana, Romčević, Nebojša Ž., Teodoro, Orlando M. N. D., Mitrić, Miodrag, Ivanović, Nenad, "XAFS and XPS analysis of Zn0.98Fe0.02Te0.91Se0.09 semiconductor" in Journal of Alloys and Compounds, 632 (2015):17-22,
https://doi.org/10.1016/j.jallcom.2015.01.169 . .

TY  - JOUR
AU  - Balog, Richard
AU  - Jorgensen, Bjarke
AU  - Nilsson, Louis
AU  - Andersen, Mie
AU  - Rienks, Emile
AU  - Bianchi, Marco
AU  - Fanetti, Mattia
AU  - Laegsgaard, Erik
AU  - Baraldi, Alessandro
AU  - Lizzit, Silvano
AU  - Šljivančanin, Željko
AU  - Besenbacher, Flemming
AU  - Hammer, Bjork
AU  - Pedersen, Thomas G.
AU  - Hofmann, Philip
AU  - Hornekaer, Liv
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3937
AB  - Graphene, a single layer of graphite, has recently attracted considerable attention owing to its remarkable electronic and structural properties and its possible applications in many emerging areas such as graphene-based electronic devices(1). The charge carriers in graphene behave like massless Dirac fermions, and graphene shows ballistic charge transport, turning it into an ideal material for circuit fabrication(2,3). However, graphene lacks a bandgap around the Fermi level, which is the defining concept for semiconductor materials and essential for controlling the conductivity by electronic means. Theory predicts that a tunable bandgap may be engineered by periodic modulations of the graphene lattice(4-6), but experimental evidence for this is so far lacking. Here, we demonstrate the existence of a bandgap opening in graphene, induced by the patterned adsorption of atomic hydrogen onto the Moire superlattice positions of graphene grown on an Ir(111) substrate.
T2  - Nature Materials
T1  - Bandgap opening in graphene induced by patterned hydrogen adsorption
VL  - 9
IS  - 4
SP  - 315
EP  - 319
DO  - 10.1038/NMAT2710
ER  - 

@article{
author = "Balog, Richard and Jorgensen, Bjarke and Nilsson, Louis and Andersen, Mie and Rienks, Emile and Bianchi, Marco and Fanetti, Mattia and Laegsgaard, Erik and Baraldi, Alessandro and Lizzit, Silvano and Šljivančanin, Željko and Besenbacher, Flemming and Hammer, Bjork and Pedersen, Thomas G. and Hofmann, Philip and Hornekaer, Liv",
year = "2010",
abstract = "Graphene, a single layer of graphite, has recently attracted considerable attention owing to its remarkable electronic and structural properties and its possible applications in many emerging areas such as graphene-based electronic devices(1). The charge carriers in graphene behave like massless Dirac fermions, and graphene shows ballistic charge transport, turning it into an ideal material for circuit fabrication(2,3). However, graphene lacks a bandgap around the Fermi level, which is the defining concept for semiconductor materials and essential for controlling the conductivity by electronic means. Theory predicts that a tunable bandgap may be engineered by periodic modulations of the graphene lattice(4-6), but experimental evidence for this is so far lacking. Here, we demonstrate the existence of a bandgap opening in graphene, induced by the patterned adsorption of atomic hydrogen onto the Moire superlattice positions of graphene grown on an Ir(111) substrate.",
journal = "Nature Materials",
title = "Bandgap opening in graphene induced by patterned hydrogen adsorption",
volume = "9",
number = "4",
pages = "315-319",
doi = "10.1038/NMAT2710"
}

Balog, R., Jorgensen, B., Nilsson, L., Andersen, M., Rienks, E., Bianchi, M., Fanetti, M., Laegsgaard, E., Baraldi, A., Lizzit, S., Šljivančanin, Ž., Besenbacher, F., Hammer, B., Pedersen, T. G., Hofmann, P.,& Hornekaer, L.. (2010). Bandgap opening in graphene induced by patterned hydrogen adsorption. in Nature Materials, 9(4), 315-319.
https://doi.org/10.1038/NMAT2710

Balog R, Jorgensen B, Nilsson L, Andersen M, Rienks E, Bianchi M, Fanetti M, Laegsgaard E, Baraldi A, Lizzit S, Šljivančanin Ž, Besenbacher F, Hammer B, Pedersen TG, Hofmann P, Hornekaer L. Bandgap opening in graphene induced by patterned hydrogen adsorption. in Nature Materials. 2010;9(4):315-319.
doi:10.1038/NMAT2710 .

Balog, Richard, Jorgensen, Bjarke, Nilsson, Louis, Andersen, Mie, Rienks, Emile, Bianchi, Marco, Fanetti, Mattia, Laegsgaard, Erik, Baraldi, Alessandro, Lizzit, Silvano, Šljivančanin, Željko, Besenbacher, Flemming, Hammer, Bjork, Pedersen, Thomas G., Hofmann, Philip, Hornekaer, Liv, "Bandgap opening in graphene induced by patterned hydrogen adsorption" in Nature Materials, 9, no. 4 (2010):315-319,
https://doi.org/10.1038/NMAT2710 . .