Topological Spin Texture in a Quantum Anomalous Hall Insulator
Name
PhysRevLett.113.136403.pdf
Size
2.44 MB
Format
Adobe PDF
Checksum (MD5)
7239a444d48e14ca2082932be0a163ad
Author(s)
Wu, Jiansheng
Liu, Jie
Liu, Xiong-Jun
Date Issued
September 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Wu, Jiansheng, Jie Liu, and Xiong-Jun Liu. "Topological Spin Texture in a Quantum Anomalous Hall Insulator." Phys. Rev. Lett. 113, 136403 (September 2014). © 2014 American Physical Society
Version
Final published version
Abstract
The quantum anomalous Hall (QAH) effect has been recently discovered in an experiment using a thin-film topological insulator with ferromagnetic ordering and strong spin-orbit coupling. Here we investigate the spin degree of freedom of a QAH insulator and uncover the fundamental phenomenon that the edge states exhibit a topologically stable spin texture in the boundary when a chiral-like symmetry is present. This result shows that edge states are chiral in both the orbital and spin degrees of freedom, and the chiral edge spin texture corresponds to the bulk topological states of the QAH insulator. We also study the potential applications of the edge spin texture in designing topological-state-based spin devices, which might be applicable to future spintronic technologies.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.136403
