TY  - JOUR
AU  - Pesic, Jelena
AU  - Popov, Igor
AU  - Solajic, Andrijana
AU  - Damljanović, Vladimir
AU  - Hingerl, Kurt
AU  - Belic, Milivoj
AU  - Gajic, Rados
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1201
AB  - Magnesium diboride gained significant interest in the materials science community after the discovery of its superconductivity, with an unusually high critical temperature of 39 K. Many aspects of the electronic properties and superconductivity of bulk MgB2 and thin sheets of MgB2 have been determined; however, a single layer of MgB2 has not yet been fully theoretically investigated. Here, we present a detailed study of the structural, electronic, vibrational, and elastic properties of monolayer MgB2, based on ab initio methods. First-principles calculations reveal the importance of reduction of dimensionality on the properties of MgB2 and thoroughly describe the properties of this novel 2D material. The presence of a negative Poisson ratio, higher density of states at the Fermi level, and a good dynamic stability under strain make the MgB2 monolayer a prominent material, both for fundamental research and application studies.
PB  - MDPI, Basel
T2  - Condensed Matter
T1  - Ab Initio Study of the Electronic, Vibrational, and Mechanical Properties of the Magnesium Diboride Monolayer
IS  - 2
VL  - 4
DO  - 10.3390/condmat4020037
ER  - 

@article{
author = "Pesic, Jelena and Popov, Igor and Solajic, Andrijana and Damljanović, Vladimir and Hingerl, Kurt and Belic, Milivoj and Gajic, Rados",
year = "2019",
abstract = "Magnesium diboride gained significant interest in the materials science community after the discovery of its superconductivity, with an unusually high critical temperature of 39 K. Many aspects of the electronic properties and superconductivity of bulk MgB2 and thin sheets of MgB2 have been determined; however, a single layer of MgB2 has not yet been fully theoretically investigated. Here, we present a detailed study of the structural, electronic, vibrational, and elastic properties of monolayer MgB2, based on ab initio methods. First-principles calculations reveal the importance of reduction of dimensionality on the properties of MgB2 and thoroughly describe the properties of this novel 2D material. The presence of a negative Poisson ratio, higher density of states at the Fermi level, and a good dynamic stability under strain make the MgB2 monolayer a prominent material, both for fundamental research and application studies.",
publisher = "MDPI, Basel",
journal = "Condensed Matter",
title = "Ab Initio Study of the Electronic, Vibrational, and Mechanical Properties of the Magnesium Diboride Monolayer",
number = "2",
volume = "4",
doi = "10.3390/condmat4020037"
}

Pesic, J., Popov, I., Solajic, A., Damljanović, V., Hingerl, K., Belic, M.,& Gajic, R.. (2019). Ab Initio Study of the Electronic, Vibrational, and Mechanical Properties of the Magnesium Diboride Monolayer. in Condensed Matter
MDPI, Basel., 4(2).
https://doi.org/10.3390/condmat4020037

Pesic J, Popov I, Solajic A, Damljanović V, Hingerl K, Belic M, Gajic R. Ab Initio Study of the Electronic, Vibrational, and Mechanical Properties of the Magnesium Diboride Monolayer. in Condensed Matter. 2019;4(2).
doi:10.3390/condmat4020037 .

Pesic, Jelena, Popov, Igor, Solajic, Andrijana, Damljanović, Vladimir, Hingerl, Kurt, Belic, Milivoj, Gajic, Rados, "Ab Initio Study of the Electronic, Vibrational, and Mechanical Properties of the Magnesium Diboride Monolayer" in Condensed Matter, 4, no. 2 (2019),
https://doi.org/10.3390/condmat4020037 . .

TY  - JOUR
AU  - Tomasevic-Ilic, Tijana
AU  - Jovanović, Đorđe
AU  - Popov, Igor
AU  - Fandan, Rajveer
AU  - Pedros, Jorge
AU  - Spasenović, Marko
AU  - Gajic, Rados
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1113
AB  - Liquid phase exfoliation followed by Langmuir-Blodgett self-assembly (LBSA) is a promising method for scalable production of thin graphene films for transparent conductor applications. However, monolayer assembly into thin films often induces a high density of defects, resulting in a large sheet resistance that hinders practical use. We introduce UV/ozone as a novel photochemical treatment that reduces sheet resistance of LBSA graphene threefold, while preserving the high optical transparency. The effect of such treatment on our films is opposite to the effect it has on mechanically exfoliated or CVD films, where UV/ozone creates additional defects in the graphene plane, increasing sheet resistance. Raman scattering shows that exposure to UV/ozone reduces the defect density in LBSA graphene, where edges are the dominant defect type. FTIR spectroscopy indicates binding of oxygen to the graphene lattice during exposure to ozone. In addition, work function measurements reveal that the treatment dopes the LBSA film, making it more conductive. Such defect patching paired with doping leads to an accessible way of improving the transparent conductor performance of LBSA graphene, making solutionprocessed thin films a candidate for industrial use.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment
EP  - 453
SP  - 446
VL  - 458
DO  - 10.1016/j.apsusc.2018.07.111
ER  - 

@article{
author = "Tomasevic-Ilic, Tijana and Jovanović, Đorđe and Popov, Igor and Fandan, Rajveer and Pedros, Jorge and Spasenović, Marko and Gajic, Rados",
year = "2018",
abstract = "Liquid phase exfoliation followed by Langmuir-Blodgett self-assembly (LBSA) is a promising method for scalable production of thin graphene films for transparent conductor applications. However, monolayer assembly into thin films often induces a high density of defects, resulting in a large sheet resistance that hinders practical use. We introduce UV/ozone as a novel photochemical treatment that reduces sheet resistance of LBSA graphene threefold, while preserving the high optical transparency. The effect of such treatment on our films is opposite to the effect it has on mechanically exfoliated or CVD films, where UV/ozone creates additional defects in the graphene plane, increasing sheet resistance. Raman scattering shows that exposure to UV/ozone reduces the defect density in LBSA graphene, where edges are the dominant defect type. FTIR spectroscopy indicates binding of oxygen to the graphene lattice during exposure to ozone. In addition, work function measurements reveal that the treatment dopes the LBSA film, making it more conductive. Such defect patching paired with doping leads to an accessible way of improving the transparent conductor performance of LBSA graphene, making solutionprocessed thin films a candidate for industrial use.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment",
pages = "453-446",
volume = "458",
doi = "10.1016/j.apsusc.2018.07.111"
}

Tomasevic-Ilic, T., Jovanović, Đ., Popov, I., Fandan, R., Pedros, J., Spasenović, M.,& Gajic, R.. (2018). Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment. in Applied Surface Science
Elsevier, Amsterdam., 458, 446-453.
https://doi.org/10.1016/j.apsusc.2018.07.111

Tomasevic-Ilic T, Jovanović Đ, Popov I, Fandan R, Pedros J, Spasenović M, Gajic R. Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment. in Applied Surface Science. 2018;458:446-453.
doi:10.1016/j.apsusc.2018.07.111 .

Tomasevic-Ilic, Tijana, Jovanović, Đorđe, Popov, Igor, Fandan, Rajveer, Pedros, Jorge, Spasenović, Marko, Gajic, Rados, "Reducing sheet resistance of self-assembled transparent graphene films by defect patching and doping with UV/ozone treatment" in Applied Surface Science, 458 (2018):446-453,
https://doi.org/10.1016/j.apsusc.2018.07.111 . .

TY  - JOUR
AU  - Damljanović, Vladimir
AU  - Popov, Igor
AU  - Gajic, Rados
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1063
AB  - Dirac-like electronic states are the main engines powering tremendous advancements in the research of graphene, topological insulators and other materials with these states. Zero effective mass, high carrier mobility and numerous applications are some consequences of linear dispersion that distinguishes Dirac states. Here we report a new class of linear electronic bands in two-dimensional materials with zero electron effective mass and sharp band edges, and predict stable materials with such electronic structures utilizing symmetry group analysis and an ab initio approach. We make a full classification of completely linear bands in two-dimensional materials and find that only two classes exist: Dirac fermions on the one hand and fortune teller-like states on the other hand. The new class supports zero effective mass similar to that of graphene and anisotropic electronic properties like that of phosphorene.
PB  - Royal Soc Chemistry, Cambridge
T2  - Nanoscale
T1  - Fortune teller fermions in two-dimensional materials
EP  - 19345
IS  - 48
SP  - 19337
VL  - 9
DO  - 10.1039/c7nr07763g
ER  - 

@article{
author = "Damljanović, Vladimir and Popov, Igor and Gajic, Rados",
year = "2017",
abstract = "Dirac-like electronic states are the main engines powering tremendous advancements in the research of graphene, topological insulators and other materials with these states. Zero effective mass, high carrier mobility and numerous applications are some consequences of linear dispersion that distinguishes Dirac states. Here we report a new class of linear electronic bands in two-dimensional materials with zero electron effective mass and sharp band edges, and predict stable materials with such electronic structures utilizing symmetry group analysis and an ab initio approach. We make a full classification of completely linear bands in two-dimensional materials and find that only two classes exist: Dirac fermions on the one hand and fortune teller-like states on the other hand. The new class supports zero effective mass similar to that of graphene and anisotropic electronic properties like that of phosphorene.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Nanoscale",
title = "Fortune teller fermions in two-dimensional materials",
pages = "19345-19337",
number = "48",
volume = "9",
doi = "10.1039/c7nr07763g"
}

Damljanović, V., Popov, I.,& Gajic, R.. (2017). Fortune teller fermions in two-dimensional materials. in Nanoscale
Royal Soc Chemistry, Cambridge., 9(48), 19337-19345.
https://doi.org/10.1039/c7nr07763g

Damljanović V, Popov I, Gajic R. Fortune teller fermions in two-dimensional materials. in Nanoscale. 2017;9(48):19337-19345.
doi:10.1039/c7nr07763g .

Damljanović, Vladimir, Popov, Igor, Gajic, Rados, "Fortune teller fermions in two-dimensional materials" in Nanoscale, 9, no. 48 (2017):19337-19345,
https://doi.org/10.1039/c7nr07763g . .