Fe-Vacancy-Ordered Fe4Se5: The Insulating Parent Phase of FeSe Superconductor

We carried out a detailed study to investigate the existence of an insulating parent phase for FeSe superconductors. The insulating Fe4Se5 with √5 × √5 Fe-vacancy order shows a 3D-Mott variable-range-hopping behavior with a Verwey-like electronic correlation at around 45 K. The application of the RT...

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Main Authors: Keng-Yu Yeh, Yan-Ruei Chen, Tung-Sheng Lo, Phillip M. Wu, Ming-Jye Wang, Kuei-Shu Chang-Liao, Maw-Kuen Wu
Formato: Artigo
Idioma:Inglês
Publicado em: Frontiers Media S.A. 2020-11-01
Colecção:Frontiers in Physics
Assuntos:
FeSe superconductors
Verwey-like transition
Fe-vacancy order
Mott insulators
Mixed-valence state
Acesso em linha:https://www.frontiersin.org/articles/10.3389/fphy.2020.567054/full
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