Shubnikov-de Haas frequencies were measured in highly degenerate n-type Bi2Se3 having a higher carrier density (∼9 × 1025m-3) than previously reported. The Fermi surface was found to be elongated along the trigonal axis, fitting a spheroidal model with an axial ratio of 5.0 for angles up to θ = 45°. Comparison of the number of carriers obtained from Hall measurements with that obtained from the Shubnikov-de Haas measurement supports the contention that the lowest conduction band minimum is a single surface located in the center of the Brillouin zone. The higher effective mass (0.25 m0) found for these carrier concentrations indicates that the band is non-parabolic.
|Original language||English (US)|
|Number of pages||7|
|Journal||Solid State Communications|
|State||Published - Aug 1 1973|
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Chemistry