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High Chern number phase in topological insulator multilayer structures: A Dirac cone model study |
| Yi-Xiang Wang(王义翔)1,2,† and Fu-Xiang Li(李福祥)2,‡ |
1 School of Science, Jiangnan University, Wuxi 214122, China;
2 School of Physics and Electronics, Hunan University, Changsha 410082, China |
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Abstract We employ the Dirac cone model to explore the high Chern number (C) phases that are realized in the magnetic-doped topological insulator (TI) multilayer structures by Zhao et al. [Nature 588 419 (2020)]. The Chern number is calculated by capturing the evolution of the phase boundaries with the parameters, then the Chern number phase diagrams of the TI multilayer structures are obtained. The high-C behavior is attributed to the band inversion of the renormalized Dirac cones, along with which the spin polarization at the $\varGamma$ point will get increased. Moreover, another two TI multilayer structures as well as the TI superlattice structures are studied.
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Received: 06 April 2022
Revised: 25 April 2022
Accepted manuscript online: 28 April 2022
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PACS:
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05.30.Fk
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(Fermion systems and electron gas)
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73.20.-r
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(Electron states at surfaces and interfaces)
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81.30.Bx
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(Phase diagrams of metals, alloys, and oxides)
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68.65.Ac
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(Multilayers)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 11804122 and 11905054), the China Postdoctoral Science Foundation (Grant No. 2021M690970), and the Fundamental Research Funds for the Central Universities of China. |
Corresponding Authors:
Yi-Xiang Wang, Fu-Xiang Li
E-mail: wangyixiang@jiangnan.edu.cn;fuxiangli@hnu.edu.cn
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Cite this article:
Yi-Xiang Wang(王义翔) and Fu-Xiang Li(李福祥) High Chern number phase in topological insulator multilayer structures: A Dirac cone model study 2022 Chin. Phys. B 31 090501
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