Two-Dimensional Dirac Fermions in a Topological Insulator: Transport in the Quantum Limit

Journal Article · Fri Aug 12 00:00:00 EDT 2011 · Submitted to Nature Physics

OSTI ID:1022557

Analytis, J. G.; McDonald, R. D.; Riggs, S. C.; Chu, J. -H.; Boebinger, G. S.; Fisher, I. R.

Pulsed magnetic fields of up to 55T are used to investigate the transport properties of the topological insulator Bi{sub 2}Se{sub 3} in the extreme quantum limit. For samples with a bulk carrier density of n = 2.9 x 10{sup 16} cm{sup -3}, the lowest Landau level of the bulk 3D Fermi surface is reached by a field of 4T. For fields well beyond this limit, Shubnikov-de Haas oscillations arising from quantization of the 2D surface state are observed, with the {nu} = 1 Landau level attained by a field of {approx} 35T. These measurements reveal the presence of additional oscillations which occur at fields corresponding to simple rational fractions of the integer Landau indices.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1022557
• Report Number(s): SLAC-PUB-14391; TRN: US1104276
• Journal Information: Submitted to Nature Physics, Journal Name: Submitted to Nature Physics
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CARRIER DENSITY
FERMI LEVEL
FERMIONS
MAGNETIC FIELDS
OSCILLATIONS
QUANTIZATION
TRANSPORT
MATSCI