Doping-induced antiferromagnetic bicollinear insulating state and superconducting temperature of monolayer FeSe systems

Michael C. Lucking; Fawei Zheng; Myung Joon Han; Junhyeok Bang; Shengbai Zhang

doi:10.1103/PhysRevB.98.014504

Doping-induced antiferromagnetic bicollinear insulating state and superconducting temperature of monolayer FeSe systems

Michael C. Lucking, Fawei Zheng, Myung Joon Han, Junhyeok Bang^*, Shengbai Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

First-principles calculations of ionic-liquid-gated (Li,Fe)OHFeSe suggest a metal-insulator transition at a nominal Li/Fe ratio of 75/25 in the (Li,Fe)OH layer. While doping increases Fermi energy, the formation of an antiferromagnetic bicollinear phase is the key for the transition. It is expected that this insulating phase also exists in other FeSe systems upon heavy electron doping, and its presence can hinder the increase of superconducting temperature. These results offer clues on how to optimize superconductivity amid its interplay with magnetic properties in FeSe systems.

Original language	English
Article number	014504
Journal	Physical Review B
Volume	98
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.98.014504
Publication status	Published - 9 Jul 2018
Externally published	Yes

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abstract = "First-principles calculations of ionic-liquid-gated (Li,Fe)OHFeSe suggest a metal-insulator transition at a nominal Li/Fe ratio of 75/25 in the (Li,Fe)OH layer. While doping increases Fermi energy, the formation of an antiferromagnetic bicollinear phase is the key for the transition. It is expected that this insulating phase also exists in other FeSe systems upon heavy electron doping, and its presence can hinder the increase of superconducting temperature. These results offer clues on how to optimize superconductivity amid its interplay with magnetic properties in FeSe systems.",

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AU - Bang, Junhyeok

AU - Zhang, Shengbai

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AB - First-principles calculations of ionic-liquid-gated (Li,Fe)OHFeSe suggest a metal-insulator transition at a nominal Li/Fe ratio of 75/25 in the (Li,Fe)OH layer. While doping increases Fermi energy, the formation of an antiferromagnetic bicollinear phase is the key for the transition. It is expected that this insulating phase also exists in other FeSe systems upon heavy electron doping, and its presence can hinder the increase of superconducting temperature. These results offer clues on how to optimize superconductivity amid its interplay with magnetic properties in FeSe systems.

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Doping-induced antiferromagnetic bicollinear insulating state and superconducting temperature of monolayer FeSe systems

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