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http://elar.urfu.ru/handle/10995/111597
Title: | Phase Separation Near the Charge Neutrality Point in FeSe1-xTexcrystals with x < 0.15 |
Authors: | Ovchenkov, Y. A. Chareev, D. A. Kozlyakova, E. S. Levin, E. E. Mikheev, M. G. Presnov, D. E. Trifonov, A. S. Volkova, O. S. Vasiliev, A. N. |
Issue Date: | 2022 |
Publisher: | IOP Publishing Ltd IOP Publishing |
Citation: | Phase Separation Near the Charge Neutrality Point in FeSe1-xTexcrystals with x < 0.15 / Y. A. Ovchenkov, D. A. Chareev, E. S. Kozlyakova et al. // Superconductor Science and Technology. — 2022. — Vol. 35. — Iss. 1. — 015011. |
Abstract: | Our study of FeSe1-xTe x crystals with x < 0.15 shows that the phase separation in these compositions occurs into phases with a different stoichiometry of iron. This phase separation may indicate structural instability of the iron plane in the studied range of compositions. We tentatively propose an explanation of the structural instability of the iron plane in the studied layered compounds in terms of the possible change in the bond polarity and the peculiarity of the direct d-d exchange in the iron plane in the framework of the basic phenomenological description such as the Bethe-Slater curve. With this approach, when the distance between iron atoms is close to the value at which the sign of the magnetic exchange for some d orbitals changes, structural and electronic instability can occur. Anomalies in the crystal field near the point of charge neutrality can also be a significant component of this instability. © 2021 IOP Publishing Ltd. |
Keywords: | FESE IRON CHALCOGENIDES PHASE SEPARATION STRUCTURAL INSTABILITY CRYSTAL ATOMIC STRUCTURE CRYSTALS INORGANIC COMPOUNDS PHASE SEPARATION SELENIUM COMPOUNDS STABILITY CHARGE NEUTRALITY D ORBITALS ELECTRONIC INSTABILITIES IRON ATOMS IRON CHALCOGENIDES LAYERED COMPOUND MAGNETIC EXCHANGE NEUTRALITY POINT PHENOMENOLOGICAL DESCRIPTION STRUCTURAL INSTABILITY IRON COMPOUNDS |
URI: | http://elar.urfu.ru/handle/10995/111597 |
Access: | info:eu-repo/semantics/openAccess |
RSCI ID: | 47903329 |
SCOPUS ID: | 85122477029 |
WOS ID: | 000728952700001 |
PURE ID: | 29158156 |
ISSN: | 0953-2048 |
DOI: | 10.1088/1361-6668/ac3e55 |
Appears in Collections: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
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