政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/125215

English | 正體中文 | 简体中文 | Post-Print筆數 : 27 | Items with full text/Total items : 113822/144841 (79%)
Visitors : 51818731 Online Users : 495

RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.

Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer

政大機構典藏 > 理學院 > 應用物理研究所 > 期刊論文 > Item 140.119/125215

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/125215

Title:	Topological phase transitions in an inverted InAs/GaSb quantum well driven by tilted magnetic fields
Authors:	許琇娟 Hsu, Hsiu-Chuan Jhang, Min-Jyun Chen, Tsung-Wei Guo, Guang-Yu
Contributors:	應物所
Date:	2017-04
Issue Date:	2019-08-15 10:55:38 (UTC+8)
Abstract:	The helical edge states in a quantum spin Hall insulator are presumably protected by time- reversal symmetry. However, even in the presence of magnetic field which breaks time-reversal symmetry, the helical edge conduction can still exist, dubbed as pseudo quantum spin Hall effect. In this work, the effects of the magnetic fields on the pseudo quantum spin Hall effect and the phase transitions are studied. We show that an in-plane magnetic field drives a pseudo quantum spin Hall state to metallic state at a high field. Moreover, at a fixed in-plane magnetic field, an increasing out-of-plane magnetic field leads to a reentrance of pseudo quantum spin Hall state in an inverted InAs/GaSb quantum well. The edge state probability distribution and Chern numbers are calculated to verify that the reentrant states are topologically nontrivial. The origin of the reentrant behavior is attributed to the nonmonotonic bending of Landau levels and the Landau level mixing caused by the orbital effect induced by the in-plane magnetic field. The robustness to disorder is demonstrated by the numerically calculated quantized conductance for disordered nanowires within Landauer-Büttiker formalism.
Relation:	Phys. Rev. B, 95, Vol.19, pp.195408
Data Type:	期刊論文
DOI 連結:	https://doi.org/10.1103/PhysRevB.95.195408
DOI:	10.1103/PhysRevB.95.195408
Appears in Collections:	[應用物理研究所 ] 期刊論文

Files in This Item:

File	Description	Size	Format
76.pdf		634Kb	Adobe PDF2	447	View/Open

社群 sharing

著作權政策宣告 Copyright Announcement

1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.

Loading...