Please use this identifier to cite or link to this item: 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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