Experimental Realization of a Three-Dimensional Topological Insulator, Bi 2Te3
Journal Article
·
· Physical Review B
OSTI ID:972669
Three-dimensional topological insulators are a new state of quantum matter with a bulk gap and odd number of relativistic Dirac fermions on the surface. By investigating the surface state of Bi{sub 2}Te{sub 3} with angle-resolved photoemission spectroscopy, we demonstrate that the surface state consists of a single nondegenerate Dirac cone. Furthermore, with appropriate hole doping, the Fermi level can be tuned to intersect only the surface states, indicating a full energy gap for the bulk states. Our results establish that Bi{sub 2}Te{sub 3} is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface. The large bulk gap of Bi{sub 2}Te{sub 3} also points to promising potential for high-temperature spintronics applications.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 972669
- Report Number(s):
- SLAC-REPRINT-2010-022
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 5937 Vol. 325; ISSN 0193-4511; ISSN SCEHDK
- Country of Publication:
- United States
- Language:
- English
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