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강상관계 물질 연구단
강상관계 물질 연구단
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Tunable magnetic topological insulating phases in monolayer CrI3

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Title
Tunable magnetic topological insulating phases in monolayer CrI3
Author(s)
Santu Baidya; Jaejun Yu; Choong Hyun Kim
Publication Date
2018-10
Journal
PHYSICAL REVIEW B, v.98, no.15, pp.155148-1 - 155148-6
Publisher
AMER PHYSICAL SOC
Abstract
We present results indicating that Chern insulator states can be achieved in the recently synthesized pristine chromium triiodide (CrI3) by either electron or hole doping. Our first-principles density-functional-theory calculations confirmed that monolayer CrI3 show nontrivial Chern number C in both the valence and conduction bands. By introducing on-site Coulomb interaction or epitaxial strain, the doped CrI3 exhibit a series of topological quantum phase transitions between multiple Chern insulator phases as well as semimetal-to-insulator transitions. We show that the covalency of Cr d-I p bands controlled by the on-site Coulomb interaction U and strain is one of the key ingredients determining the topological phase and semimetal-insulator phase boundary. ©2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/5113
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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