Giant nonlocal edge conduction in the axion insulator state of MnBi2Te4

Li, Yaoxin; Liu, Chang; Wang, Yongchao; Lian, Zichen; Li, Shuai; Li, Hao; Wu, Yang; Lu, Hai-Zhou; Zhang, Jinsong; Wang, Yayu

doi:10.1016/j.scib.2023.05.011

Cited by 13 publications

(12 citation statements)

References 64 publications

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“…清华大学王亚愚和徐勇等 [32] 发现MBT薄膜(6 SL)在磁场下可实现量子反常霍尔态与轴子绝缘态之间的量子转变. 北京大学王健课题组 [33] 实现了MBT器件高陈数的量子反常霍尔态. 清华大学王亚愚团队和张金松团队合作 [34] 测量出只存在于偶数层轴子绝缘态MBT的非定域电阻.…”

Section: 引言unclassified

“…图 7 MBT高陈数陈绝缘体态 (a) 5 SLs MBT门电压调控的反常霍尔效应 [31] ; (b) 5 SLs MBT的顶部和底部表面态的示意图 [31] ; (c) 10 SLs MBT中C = 2的高陈数陈绝缘体态的R yx 和R xx 与磁场和温度间的关系 [33] ; (d) 具有两个手性边缘态的高陈数陈绝缘态示意图; 灰色和绿色表示相邻SLs的MBT [33] ; (e) 铁磁 MBT能带结构示意图, 其为磁性Weyl 半金属 [33] ; (f) 计算得到的MBT 陈数随膜厚的变化函数 [33] Fig. 7.…”

Section: 轴子绝缘体态unclassified

“…(b) Schematic band diagrams for the top and bottom surface states of this fivelayer sample [31] . (c) Temperature and magnetic field dependence of R yx and R xx in high-Chern-number Chern insulator states with C = 2 in 10 SLs MBT device [33] . (d) Schematic of high-Chern-number Chern insulator states with two chiral edge states across the band gap; gray and green indicate adjacent MBT SLs [33] .…”

Section: 轴子绝缘体态mentioning

confidence: 99%

“…(e) Schematic diagram of band structure of the ferromagnetic MBT, which is a magnetic Weyl semimetal [33] . (f) Chern number as a function of film thickness in MBT [33] .…”

Section: 轴子绝缘体态mentioning

confidence: 99%

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Research progress of intrinsic magnetic topological insulator MnBi2Te4

Xie,

Li,

Zeng

et al. 2023

Acta Phys. Sin.

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The interaction between non-trivial topological states and the magnetic order of intrinsic magnetic topological insulators gives rise to various exotic physical properties,including the quantum anomalous Hall effect and axion insulator, etc. These materials hold great potential for application in low-power topological spintronic devices and topological quantum computation. Since the discovery of the first intrinsic magnetic topological insulator, MnBi2Te4, in 2019, this material system has garnered significant attention from researchers and sparked a research boom. This paper begins by discussing the fundamental properties of MnBi2Te4 and then delves into important research findings related to this intrinsic magnetic topological insulator. Specifically, it focuses on the quantum anomalous Hall effect, axion insulating state, and Majorana zero energy mode exhibited by the MnBi2Te4 series. Furthermore, the paper highlights other research directions and current challenges associated with this material system. Finally, the paper provides a summary and outlook for future research on MnBi2Te4, aiming to offer valuable references for researchers in related fields.

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Section: 引言unclassified

Section: 轴子绝缘体态unclassified

Section: 轴子绝缘体态mentioning

confidence: 99%

“…(e) Schematic diagram of band structure of the ferromagnetic MBT, which is a magnetic Weyl semimetal [33] . (f) Chern number as a function of film thickness in MBT [33] .…”

Section: 轴子绝缘体态mentioning

confidence: 99%

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Research progress of intrinsic magnetic topological insulator MnBi2Te4

Xie,

Li,

Zeng

et al. 2023

Acta Phys. Sin.

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“…Hall effect in magnetic materials. Antiferromagnetic topological insulator MnBi2Te4 has rich magnetic structures and striking topological band structures [7,[28][29][30][31][32][33][34][35][36][37][38]. The lattice structure of MnBi2Te4 is shown in Fig.…”

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confidence: 99%

Economic Radiating Effects of the Guangdong–Hong Kong–Macao Greater Bay Area in China Effects of the Guangdong–Hong Kong–Macao Greater Bay Area

2021

Guangdong-Hong Kong-Macao Greater Bay Area

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In a dual weighted residual based adaptive finite element method for solving partial differential equations, a new finite element space needs to be built for solving the dual problem, due to the Galerkin orthogonality. Two popular approaches in the literature are h-refinement and p-refinement for the purpose, respectively, which would cause nonignorable requirement on computational resources. In this paper, a novel approach is proposed for implementing the dual weighted residual method through a multiple precision technique, i.e., the primal and dual problems are solved in two finite element spaces, respectively, built with the same mesh, degrees of freedom, and basis functions, yet different precisions. The feasibility of such an approach is discussed in detail. Besides effectively avoiding the issue introduced by the Galerkin orthogonality, remarkable benefits can also be expected for the efficiency from this new approach, since i). operations on reorganizing mesh grids and/or degrees of freedom in building a finite element space in hand p-refinement methods can be avoided, and ii). both CPU time and storage needed for solving the derived system of linear equations can be significantly reduced compared with hand p-refinement methods. In coding the algorithm with a library AFEPack, no extra module is needed compared with the program for solving the primal problem with the employment of a C++

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Memristive switching in the surface of a charge–density–wave topological semimetal

Ma,

Meng,

Zhang

et al. 2024

Science Bulletin

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Giant nonlocal edge conduction in the axion insulator state of MnBi2Te4

Cited by 13 publications

References 64 publications

Research progress of intrinsic magnetic topological insulator MnBi<sub>2</sub>Te<sub>4</sub>

Research progress of intrinsic magnetic topological insulator MnBi<sub>2</sub>Te<sub>4</sub>

Economic Radiating Effects of the Guangdong–Hong Kong–Macao Greater Bay Area in China Effects of the Guangdong–Hong Kong–Macao Greater Bay Area

Memristive switching in the surface of a charge–density–wave topological semimetal

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