Title

Quantum Interference in Macroscopic Crystals of Nonmetallic Bi2Se3

Abstract

Photoemission experiments have shown that Bi2Se3 is a topological insulator. By controlled doping, we have obtained crystals of Bi2Se3 with nonmetallic conduction. At low temperatures, we uncover a novel type of magnetofingerprint signal which involves the spin degrees of freedom. Given the mm-sized crystals, the observed amplitude is 200-500x larger than expected from universal conductance fluctuations. The results point to very long phase-breaking lengths in an unusual conductance channel in these nonmetallic samples. We discuss the nature of the in-gap conducting states and their relation to the topological surface states.

Department(s)

Physics

Keywords and Phrases

Breaking Length; Conductance Channels; Conducting State; Low Temperatures; Quantum Interference; Spin Degrees Of Freedom; Surface State; Universal Conductance Fluctuations; Crystals

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2009 American Physical Society (APS), All rights reserved.

This document is currently not available here.

Share

 
COinS