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摘要

拓扑物态包括拓扑绝缘体、拓扑半金属以及拓扑超导体. 拓扑物态奇异的能带结构以及受拓扑保护的新奇表面态, 使其具有了独特的输运性质. 拓扑半金属作为物质的一种三维拓扑态具有无能隙的准粒子激发, 根据导带和价带的接触类型分为外尔半金属、狄拉克半金属和节线半金属. 本文以拓扑半金属为主回顾了在磁场下拓扑物态中量子输运的最新工作, 在不同的磁场范围内分别给出了描述拓扑物态输运行为的主要理论.

关键词:

Topological matters include topological insulator, topological semimetal and topological superconductor. The topological semimetals are three-dimensional topological states of matter with gapless electronic excitations. They are simply divided into Weyl, Dirac, and nodal-line semimetals according to the touch type of the conduction band and the valence band. Their characteristic electronic structures lead to topologically protected surface states at certain surfaces, corresponding to the novel transport properties. We review our recent works on quantum transport mainly in topological semimetals. The main theories describing the transport behavior of topological matters are given in different magnetic regions.

Keywords:

作者及机构信息

强晓斌^1,2,
卢海舟^1,2

1.
2.

通信作者:卢海舟,luhz@sustech.edu.cn

作者简介:

卢海舟, 2007年在清华大学高等研究院获博士学位. 同年赴香港大学做博士后研究, 2012年晋升为研究助理教授. 2015年加入南方科技大学, 现为物理系和深圳量子科学与工程研究院教授. 主要从事凝聚态物理, 特别是量子输运理论的研究. 研究兴趣集中在利用量子场论方法研究拓扑和新奇材料中的量子态和量子输运. 系统地研究了二维和三维狄拉克电子的量子输运行为, 并应用于拓扑绝缘体/半金属/超导体, 二维层状材料等. 研究过的物理效应包括弱局域化、奇异负磁阻、量子振荡、强磁场量子极限、各类霍尔效应等, 在拓扑半金属中提出了三维量子霍尔效应的一种基于费米弧的新机制, 多个理论工作被实验广泛支持和应用

基金项目:国家重点基础研究发展计划(批准号: 2016YFA0301700)、国家自然科学基金(批准号: 11925402)、广东省自然科学基金(批准号: 2016ZT06D348)和深圳市科学技术创新委员会(批准号: ZDSYS20170303165926217, JCYJ20170412152620376)资助的课题

Authors and contacts

1.
2.

Corresponding author:Lu Hai-Zhou,luhz@sustech.edu.cn

Funds:Project supported by the National Key R&D Program of China (Grant No. 2016YFA0301700), the National Natural Science Foundation of China (Grant No. 11925402), the Natural Science Foundation of Guangdong Province, China (Grant No. 2016ZT06D348), and the Science and Technology Innovation Commission of Shenzhen, China (Grant Nos. ZDSYS20170303165926217, JCYJ20170412152620376)

文章全文: translate this paragraph

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施引文献

下载: 全尺寸图片幻灯片

	正交	辛	幺正
时间反演	√	√	×
自旋旋转	√	×	×
WL/WAL	WL	WAL	×

下载: 导出CSV

系统	电子载流子	空穴载流子
2D抛物线	–1/2	1/2
3D抛物线	–5/8	5/8
2D线性	0	0
3D线性	–1/8	1/8
磁场$B_z$中的节线	$-5/8(\alpha), 5/8(\beta)$	$5/8(\alpha), -5/8(\beta)$
磁场$B_{/\!/}$中的节线	$-5/8(\gamma), 1/8(\delta)$	$5/8(\gamma), -1/8(\delta)$

下载: 导出CSV

文献	$\phi_{\rm{exp}}$	$\phi_{\rm{Weyl}}$	$\phi_{\rm{Dirac}}$
[50]	0.06 — 0.08	–0.94 — –0.92	–5/8
[51]	0.11 — 0.38	–0.89 — –0.62	–5/8
[54]	0.04	–0.96	–5/8

下载: 导出CSV

	贝里相位	最大/ 最小	电子	空穴
$\alpha$	0	最大	$ -1/2+0-1/8 = -5/8 $	+5/8
$\beta$	0	最小	$-1/2+0+1/8 = -3/8 \leftrightarrow 5/8$	–5/8
$\gamma$	0	最大	$ -1/2+0 - 1/8 = - 5/8 $	+5/8
δ	π	最小	$-1/2+\pi/2\pi+1/8 = 1/8$	–1/8

下载: 导出CSV

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