TY  - JOUR
AU  - Blagojević, Jovan
AU  - Đurđić-Mijin, Sanja
AU  - Bekaert, J.
AU  - Opačić, Marko
AU  - Liu, Y.
AU  - Milošević, Milorad V.
AU  - Petrović, Čedomir
AU  - Popović, Zoran V.
AU  - Lazarević, Nenad
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13344
AB  - The vibrational properties of 2⁢𝐻−TaSe2−𝑥⁢S𝑥 (0≤𝑥≤2) single crystals were probed using Raman spectroscopy and density functional theory calculations. The end members revealed two out of four symmetry-predicted Raman active modes, together with the pronounced two-phonon structure, attributable to the enhanced electron-phonon coupling. Additional peaks become observable due to crystallographic disorder for the doped samples. The evolution of the 𝐸2 2⁢𝑔 mode Fano parameter reveals that the disorder has a weak impact on electron-phonon coupling, which is also supported by the persistence of two-phonon structure in doped samples. As such, this research provides thorough insights into the lattice properties, the effects of crystallographic disorder on Raman spectra, and the interplay of this disorder with the electron-phonon coupling in 2⁢𝐻−TaSe2−𝑥⁢S𝑥 compounds.
T2  - Physical Review Materials
T1  - Competition of disorder and electron-phonon coupling in                                                                  2                        H                        −                                                  TaSe                                                      2                            −                            x                                                                                                    S                          x                                                                                                                  (                        0                        ≤                        x                        ≤                        2                        )                                                              as evidenced by Raman spectroscopy
VL  - 8
IS  - 2
SP  - 024004
DO  - 10.1103/PhysRevMaterials.8.024004
ER  - 

@article{
author = "Blagojević, Jovan and Đurđić-Mijin, Sanja and Bekaert, J. and Opačić, Marko and Liu, Y. and Milošević, Milorad V. and Petrović, Čedomir and Popović, Zoran V. and Lazarević, Nenad",
year = "2024",
abstract = "The vibrational properties of 2⁢𝐻−TaSe2−𝑥⁢S𝑥 (0≤𝑥≤2) single crystals were probed using Raman spectroscopy and density functional theory calculations. The end members revealed two out of four symmetry-predicted Raman active modes, together with the pronounced two-phonon structure, attributable to the enhanced electron-phonon coupling. Additional peaks become observable due to crystallographic disorder for the doped samples. The evolution of the 𝐸2 2⁢𝑔 mode Fano parameter reveals that the disorder has a weak impact on electron-phonon coupling, which is also supported by the persistence of two-phonon structure in doped samples. As such, this research provides thorough insights into the lattice properties, the effects of crystallographic disorder on Raman spectra, and the interplay of this disorder with the electron-phonon coupling in 2⁢𝐻−TaSe2−𝑥⁢S𝑥 compounds.",
journal = "Physical Review Materials",
title = "Competition of disorder and electron-phonon coupling in                                                                  2                        H                        −                                                  TaSe                                                      2                            −                            x                                                                                                    S                          x                                                                                                                  (                        0                        ≤                        x                        ≤                        2                        )                                                              as evidenced by Raman spectroscopy",
volume = "8",
number = "2",
pages = "024004",
doi = "10.1103/PhysRevMaterials.8.024004"
}

Blagojević, J., Đurđić-Mijin, S., Bekaert, J., Opačić, M., Liu, Y., Milošević, M. V., Petrović, Č., Popović, Z. V.,& Lazarević, N.. (2024). Competition of disorder and electron-phonon coupling in                                                                  2                        H                        −                                                  TaSe                                                      2                            −                            x                                                                                                    S                          x                                                                                                                  (                        0                        ≤                        x                        ≤                        2                        )                                                              as evidenced by Raman spectroscopy. in Physical Review Materials, 8(2), 024004.
https://doi.org/10.1103/PhysRevMaterials.8.024004

Blagojević J, Đurđić-Mijin S, Bekaert J, Opačić M, Liu Y, Milošević MV, Petrović Č, Popović ZV, Lazarević N. Competition of disorder and electron-phonon coupling in                                                                  2                        H                        −                                                  TaSe                                                      2                            −                            x                                                                                                    S                          x                                                                                                                  (                        0                        ≤                        x                        ≤                        2                        )                                                              as evidenced by Raman spectroscopy. in Physical Review Materials. 2024;8(2):024004.
doi:10.1103/PhysRevMaterials.8.024004 .

Blagojević, Jovan, Đurđić-Mijin, Sanja, Bekaert, J., Opačić, Marko, Liu, Y., Milošević, Milorad V., Petrović, Čedomir, Popović, Zoran V., Lazarević, Nenad, "Competition of disorder and electron-phonon coupling in                                                                  2                        H                        −                                                  TaSe                                                      2                            −                            x                                                                                                    S                          x                                                                                                                  (                        0                        ≤                        x                        ≤                        2                        )                                                              as evidenced by Raman spectroscopy" in Physical Review Materials, 8, no. 2 (2024):024004,
https://doi.org/10.1103/PhysRevMaterials.8.024004 . .

TY  - JOUR
AU  - Wang, Aifeng
AU  - Milosavljević, Ana
AU  - Abeykoon, A. M. Milinda
AU  - Ivanovski, Valentin N.
AU  - Du, Qianheng
AU  - Baum, Andreas
AU  - Stavitski, Eli
AU  - Liu, Yu
AU  - Lazarević, Nenad
AU  - Attenkofer, Klaus
AU  - Hackl, Rudi
AU  - Popović, Zoran
AU  - Petrović, Čedomir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10380
AB  - Connections between crystal chemistry and critical temperature Tc have been in the focus of superconductivity, one of the most widely studied phenomena in physics, chemistry, and materials science alike. In most Fe-based superconductors, materials chemistry and physics conspire so that Tc correlates with the average anion height above the Fe plane, i.e., with the geometry of the FeAs4 or FeCh4 (Ch = Te, Se, or S) tetrahedron. By synthesizing Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1), we find that in alloyed crystals Tc is not correlated with the anion height like it is for most other Fe superconductors. Instead, changes in Tc(x) and tetragonal-to-orthorhombic (nematic) transition Ts(x) upon cooling are correlated with disorder in Fe vibrations in the direction orthogonal to Fe planes, along the crystallographic c-axis. The disorder stems from the random nature of S substitution, causing deformed Fe(Se,S)4 tetrahedra with different Fe–Se and Fe–S bond distances. Our results provide evidence of Tc and Ts suppression by disorder in anion height. The connection to local crystal chemistry may be exploited in computational prediction of new superconducting materials with FeSe/S building blocks.
T2  - Inorganic Chemistry
T1  - Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder
VL  - 61
IS  - 29
SP  - 11036
EP  - 11045
DO  - 10.1021/acs.inorgchem.2c00568
ER  - 

@article{
author = "Wang, Aifeng and Milosavljević, Ana and Abeykoon, A. M. Milinda and Ivanovski, Valentin N. and Du, Qianheng and Baum, Andreas and Stavitski, Eli and Liu, Yu and Lazarević, Nenad and Attenkofer, Klaus and Hackl, Rudi and Popović, Zoran and Petrović, Čedomir",
year = "2022",
abstract = "Connections between crystal chemistry and critical temperature Tc have been in the focus of superconductivity, one of the most widely studied phenomena in physics, chemistry, and materials science alike. In most Fe-based superconductors, materials chemistry and physics conspire so that Tc correlates with the average anion height above the Fe plane, i.e., with the geometry of the FeAs4 or FeCh4 (Ch = Te, Se, or S) tetrahedron. By synthesizing Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1), we find that in alloyed crystals Tc is not correlated with the anion height like it is for most other Fe superconductors. Instead, changes in Tc(x) and tetragonal-to-orthorhombic (nematic) transition Ts(x) upon cooling are correlated with disorder in Fe vibrations in the direction orthogonal to Fe planes, along the crystallographic c-axis. The disorder stems from the random nature of S substitution, causing deformed Fe(Se,S)4 tetrahedra with different Fe–Se and Fe–S bond distances. Our results provide evidence of Tc and Ts suppression by disorder in anion height. The connection to local crystal chemistry may be exploited in computational prediction of new superconducting materials with FeSe/S building blocks.",
journal = "Inorganic Chemistry",
title = "Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder",
volume = "61",
number = "29",
pages = "11036-11045",
doi = "10.1021/acs.inorgchem.2c00568"
}

Wang, A., Milosavljević, A., Abeykoon, A. M. M., Ivanovski, V. N., Du, Q., Baum, A., Stavitski, E., Liu, Y., Lazarević, N., Attenkofer, K., Hackl, R., Popović, Z.,& Petrović, Č.. (2022). Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder. in Inorganic Chemistry, 61(29), 11036-11045.
https://doi.org/10.1021/acs.inorgchem.2c00568

Wang A, Milosavljević A, Abeykoon AMM, Ivanovski VN, Du Q, Baum A, Stavitski E, Liu Y, Lazarević N, Attenkofer K, Hackl R, Popović Z, Petrović Č. Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder. in Inorganic Chemistry. 2022;61(29):11036-11045.
doi:10.1021/acs.inorgchem.2c00568 .

Wang, Aifeng, Milosavljević, Ana, Abeykoon, A. M. Milinda, Ivanovski, Valentin N., Du, Qianheng, Baum, Andreas, Stavitski, Eli, Liu, Yu, Lazarević, Nenad, Attenkofer, Klaus, Hackl, Rudi, Popović, Zoran, Petrović, Čedomir, "Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder" in Inorganic Chemistry, 61, no. 29 (2022):11036-11045,
https://doi.org/10.1021/acs.inorgchem.2c00568 . .