TY  - JOUR
AU  - Liu, Yu
AU  - Tong, Xiao
AU  - Ivanovski, Valentin N.
AU  - Hu, Zhixiang
AU  - Leshchev, Denis
AU  - Zhu, Xiangde
AU  - Lei, Hechang
AU  - Stavitski, Eli
AU  - Attenkofer, Klaus
AU  - Koteski, Vasil J.
AU  - Petrović, Čedomir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10479
AB  - Charge density waves (CDWs) with superconductivity, competing Fermi surface instabilities, and collective orders have captured much interest in two-dimensional van der Waals (vdW) materials. Understanding the CDW suppression mechanism, its connection to the emerging superconducting state, and electronic correlations provides opportunities for engineering the electronic properties of vdW heterostructures and thin-film devices. Using a combination of the thermal transport, x-ray photoemission spectroscopy, Raman measurements, and first-principles calculations, we observe an increase in electronic correlations of the conducting states as the CDW is suppressed in ZrTe3 with 5% Cu and Ni intercalation in the vdW gap. As superconductivity emerges, intercalation brings not only decoupling of quasi-one-dimensional conduction electrons with phonons as a consequence of intercalation-induced lattice expansion but also a drastic increase in Zr2+ at the expense of Zr4+ metal atoms. These observations not only demonstrate the potential of atomic intercalates in the vdW gap for ground-state tuning but also illustrate the crucial role of the Zr metal valence in the formation of collective electronic orders.
T2  - Physical Review B
T1  - Enhanced superconductivity and electron correlations in intercalated ZrTe3
VL  - 106
IS  - 16
SP  - 165113
DO  - 10.1103/PhysRevB.106.165113
ER  - 

@article{
author = "Liu, Yu and Tong, Xiao and Ivanovski, Valentin N. and Hu, Zhixiang and Leshchev, Denis and Zhu, Xiangde and Lei, Hechang and Stavitski, Eli and Attenkofer, Klaus and Koteski, Vasil J. and Petrović, Čedomir",
year = "2022",
abstract = "Charge density waves (CDWs) with superconductivity, competing Fermi surface instabilities, and collective orders have captured much interest in two-dimensional van der Waals (vdW) materials. Understanding the CDW suppression mechanism, its connection to the emerging superconducting state, and electronic correlations provides opportunities for engineering the electronic properties of vdW heterostructures and thin-film devices. Using a combination of the thermal transport, x-ray photoemission spectroscopy, Raman measurements, and first-principles calculations, we observe an increase in electronic correlations of the conducting states as the CDW is suppressed in ZrTe3 with 5% Cu and Ni intercalation in the vdW gap. As superconductivity emerges, intercalation brings not only decoupling of quasi-one-dimensional conduction electrons with phonons as a consequence of intercalation-induced lattice expansion but also a drastic increase in Zr2+ at the expense of Zr4+ metal atoms. These observations not only demonstrate the potential of atomic intercalates in the vdW gap for ground-state tuning but also illustrate the crucial role of the Zr metal valence in the formation of collective electronic orders.",
journal = "Physical Review B",
title = "Enhanced superconductivity and electron correlations in intercalated ZrTe3",
volume = "106",
number = "16",
pages = "165113",
doi = "10.1103/PhysRevB.106.165113"
}

Liu, Y., Tong, X., Ivanovski, V. N., Hu, Z., Leshchev, D., Zhu, X., Lei, H., Stavitski, E., Attenkofer, K., Koteski, V. J.,& Petrović, Č.. (2022). Enhanced superconductivity and electron correlations in intercalated ZrTe3. in Physical Review B, 106(16), 165113.
https://doi.org/10.1103/PhysRevB.106.165113

Liu Y, Tong X, Ivanovski VN, Hu Z, Leshchev D, Zhu X, Lei H, Stavitski E, Attenkofer K, Koteski VJ, Petrović Č. Enhanced superconductivity and electron correlations in intercalated ZrTe3. in Physical Review B. 2022;106(16):165113.
doi:10.1103/PhysRevB.106.165113 .

Liu, Yu, Tong, Xiao, Ivanovski, Valentin N., Hu, Zhixiang, Leshchev, Denis, Zhu, Xiangde, Lei, Hechang, Stavitski, Eli, Attenkofer, Klaus, Koteski, Vasil J., Petrović, Čedomir, "Enhanced superconductivity and electron correlations in intercalated ZrTe3" in Physical Review B, 106, no. 16 (2022):165113,
https://doi.org/10.1103/PhysRevB.106.165113 . .

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 . .