Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2009 Jul 10;325(5937):178-81.
doi: 10.1126/science.1173034. Epub 2009 Jun 11.

Experimental realization of a three-dimensional topological insulator, Bi2Te3

Y L Chen  1 , J G Analytis, J-H Chu, Z K Liu, S-K Mo, X L Qi, H J Zhang, D H Lu, X Dai, Z Fang, S C Zhang, I R Fisher, Z Hussain, Z-X Shen
Affiliations

Experimental realization of a three-dimensional topological insulator, Bi2Te3

Y L Chen et al. Science. .

Abstract

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 Bi2Te3 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 Bi2Te3 is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface. The large bulk gap of Bi2Te3 also points to promising potential for high-temperature spintronics applications.

PubMed Disclaimer

Publication types

LinkOut - more resources