Year: 1984
Type: article
Abstract: The thermoelastic properties of n- and p-type Bi 2 Te 3 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 Bi 2 Te 3 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.
Authors: P Dato, H Kohler
Institution: University of Würzburg
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1669815363