skip to main content

DOE PAGESDOE PAGES

Title: Experimental study of the valence band of Bi2Se3

The valence band of Bi2Se3 is investigated with Shubnikov - de Haas measurements, galvanomagnetic and thermoelectric transport. At low hole concentration, the hole Fermi surface is closed and box-like, but at higher concentrations it develops tube-like extensions that are open. The experimentally determined density-of-states effective mass is lighter than density-functional theory calculations predict; while we cannot give a definitive explanation for this, we suspect that the theory may lack sufficient precision to compute room-temperature transport properties, such as the Seebeck coefficient, in solids in which there are Van der Waals interlayer bonds.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. The Ohio State Univ., Columbus, OH (United States). Dept of Mechanical and Aerospace Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Gentherm, Inc., Azusa, CA (United States)
  4. The Ohio State Univ., Columbus, OH (United States). Dept of Mechanical and Aerospace Engineering; The Ohio State Univ., Columbus, OH (United States). Dept of Physics
Publication Date:
OSTI Identifier:
1185394
Grant/Contract Number:
AC05-00OR22725; CBET-1048622
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 12; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Laboratory (ORNL)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS thermoelectric