Control of topological phase transitions in Dirac semimetal films by exchange fields

doi:10.1088/1674-1056/26/1/017102

中国物理B ›› 2017, Vol. 26 ›› Issue (1): 17102-017102.doi: 10.1088/1674-1056/26/1/017102

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Control of topological phase transitions in Dirac semimetal films by exchange fields

Fei Yang(杨菲), Hai-Long Wang(王海龙), Hui Pan(潘晖)

Department of Physics, Beihang University, Beijing 100191, China

收稿日期:2016-07-05 修回日期:2016-10-22 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: Hai-Long Wang, Hui Pan E-mail:hlwang@buaa.edu.cn;hpan@buaa.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11574019).

Control of topological phase transitions in Dirac semimetal films by exchange fields

Fei Yang(杨菲), Hai-Long Wang(王海龙), Hui Pan(潘晖)

Department of Physics, Beihang University, Beijing 100191, China

Received:2016-07-05 Revised:2016-10-22 Online:2017-01-05 Published:2017-01-05
Contact: Hai-Long Wang, Hui Pan E-mail:hlwang@buaa.edu.cn;hpan@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11574019).

摘要/Abstract

摘要：

The exchange field effects on topological Dirac semimetal (DSM) films are discussed in this article. A topological phase transition can be controlled by tuning the exchange field together with the quantum confinement effects. What is more interesting is that the system can transit into the quantum anomalous Hall (QAH) state from the topologically trivial state (Z₂=0) or from the topologically nontrivial state (Z₂=1), depending on the thickness of the DSM films. This provides a useful mechanism to realize the QAH state from the DSM.

关键词: exchange field, Dirac semimetal, quantum anomalous Hall state, quantum spin Hall state

Abstract:

Key words: exchange field, Dirac semimetal, quantum anomalous Hall state, quantum spin Hall state

中图分类号: (Electron density of states and band structure of crystalline solids)

71.20.-b

73.20.At (Surface states, band structure, electron density of states) 73.22.Gk (Broken symmetry phases) 73.43.Nq (Quantum phase transitions)

杨菲, 王海龙, 潘晖. Control of topological phase transitions in Dirac semimetal films by exchange fields[J]. 中国物理B, 2017, 26(1): 17102-017102.

Fei Yang(杨菲), Hai-Long Wang(王海龙), Hui Pan(潘晖). Control of topological phase transitions in Dirac semimetal films by exchange fields[J]. Chin. Phys. B, 2017, 26(1): 17102-017102.

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Control of topological phase transitions in Dirac semimetal films by exchange fields

Control of topological phase transitions in Dirac semimetal films by exchange fields

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