Observation of chiral currents at the magnetic domain boundary of a topological insulator
Abstract
Inducing magnetism in a topological insulator can lead to exotic effects. The usual experimental route is to introduce magnetic dopants into the material, but that approach is intricate and creates unwanted disorder. Wang et al. used a simpler technique: They fabricated a bilayer consisting of Bi 2 Se 3 , a topological insulator, and EuS, a magnet. The physical proximity of EuS induced magnetism on the surface of Bi 2 Se 3 . This approach allowed for the creation of magnetic domains at will and the detection of characteristic current flowing along the domains' edges.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 28, 2015
- Source ID
- 10.1126/science.aaa0508
Entities
People
- F. Katmis
- J. R. Kirtley
- J. S. Moodera
- K. A. Moler
- Pablo Jarillo-Herrero
- Y. H. Wang
Organizations
- Massachusetts Institute of Technology
- National Science Foundation
- Office of Naval Research
- Stanford University