Defect-induced bonding in Bi2Te3from thermoelastic properties
- 30 July 1984
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 17 (21) , 3711-3719
- https://doi.org/10.1088/0022-3719/17/21/004
Abstract
The thermoelastic properties of n- and p-type Bi2Te3 under uniaxial stress are investigated. It is assumed that the weakest bondings between the Te(1)-Te(1) double atomic layers give the largest contribution to ( delta T/ delta p)s. The magnitude of the effect for nonstoichiometric Bi2Te3 clearly depends on the Te(2) defect concentration in the centre of the -(Te(1)=Bi=Te(2)=Bi=Te(1))- fivefold layers, indicating the connection between the total number of valence electrons available and the nearest-neighbours configuration. Tellurium vacancies reduced the amount of ionic bonding within the fivefold layers (Bi-Te(1)), but increase the covalent bonding across the Te(1)-Te(1) double layers.Keywords
This publication has 10 references indexed in Scilit:
- Generalized phonon density of states of the layer compounds Bi2Se3, Bi2Te3, Sb2Te3and Bi2(Te0.5Se0.5)3, (Bi0.5Sb0.5)2Te3Journal of Physics C: Solid State Physics, 1981
- Lattice vibrations of Bi2Te3Physica Status Solidi (b), 1978
- A Raman and far‐infrared investigation of phonons in the rhombohedral V2–VI3 compounds Bi2Te3, Bi2Se3, Sb2Te3 and Bi2(Te1−xSex)3 (0 < x < 1), (Bi1−ySby)2Te3 (0 < y < 1)Physica Status Solidi (b), 1977
- The g‐Factor of the Holes in the Highest Valence Band of Bi2Te3Physica Status Solidi (b), 1976
- Anisotropic g‐Factor of the Conduction Electrons in Bi2Te3Physica Status Solidi (b), 1976
- Non‐Parabolicity of the Highest Valence Band of Bi2Te3 from Shubnikov‐de Haas EffectPhysica Status Solidi (b), 1976
- Non‐Parabolic E(k) Relation of the Lowest Conduction Band in Bi2 Te3Physica Status Solidi (b), 1976
- Optical phonons of Bi2 Te3Physica Status Solidi (b), 1973
- Elastic Moduli and Phonon Properties ofPhysical Review B, 1972
- The Elastic Constants of Anisotropic MaterialsReviews of Modern Physics, 1946