Precision mapping the topological bands of 2D spin-orbit coupling with microwave spin-injection spectroscopy

被引：3
|
作者：
Xu, Xiao-Tian [1 ,2 ,3 ]
Yi, Chang-Rui [1 ,2 ,3 ]
Wang, Bao-Zong [1 ,2 ,3 ,4 ,5 ]
Sun, Wei [1 ,2 ,3 ]
Deng, Youjin [1 ,2 ,3 ]
Liu, Xiong-Jun [4 ,5 ]
Chen, Shuai [1 ,2 ,3 ]
Pan, Jian-Wei [1 ,2 ,3 ]
机构：
[1] Univ Sci & Technol China, Shanghai Branch, Natl Res Ctr Phys Sci Microscale, Shanghai 201315, Peoples R China
[2] Univ Sci & Technol China, Dept Modern Phys, Shanghai 201315, Peoples R China
[3] Univ Sci & Technol China, Chinese Acad Sci, Ctr Excellence Quantum Informat & Quantum Phys, Hefei 230326, Anhui, Peoples R China
[4] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China
[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
来源：
SCIENCE BULLETIN | 2018年 / 63卷 / 22期
基金：
国家重点研发计划;
关键词：
2D spin-orbit coupling; Microwave spin-injection spectroscopy; Spin polarization; Topological band; Topological phase transition; PHOTOLUMINESCENCE SPECTROSCOPY; SPINTRONICS;
D O I：
10.1016/j.scib.2018.11.002
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
To investigate the band structure is one of the key approaches to study the fundamental properties of a novel material. We report here the precision band mapping of a 2-dimensional (2D) spin-orbit (SO) coupling in an optical lattice. By applying the microwave spin-injection spectroscopy, the band structure and spin-polarization distribution are achieved simultaneously. The band topology is also addressed with observing the band gap close and re-open at the Dirac points. Furthermore, the lattice depth and the Raman coupling strength are precisely calibrated with relative errors in the order of 10(-3). Our approach could also be applied for exploring the exotic topological phases with even higher dimensional system. (C) 2018 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
引用
收藏
页码：1464 / 1469
页数：6
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