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Study of elastic properties and their pressure dependence of zincblende structure semiconductors
Author(s) -
Singh R. K.,
Singh Sadhna
Publication year - 1987
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221400211
Subject(s) - van der waals force , third order , semiconductor , thermodynamics , condensed matter physics , order (exchange) , constant (computer programming) , chemistry , first order , materials science , physics , quantum mechanics , mathematics , molecule , computer science , philosophy , theology , finance , economics , programming language
A three‐body force potential is used to derive the correct expressions for third‐order elastic constants and pressure derivatives of second‐order elastic constants for the zincblende structure semiconductors following the lines of Sharma and Verma. These corrected expressions are used for the first time to study the elastic properties and their pressure dependence of ZnS, ZnSe, and ZnTe. It is found that the inclusion of the corrections and the van der Waals interactions yield more reasonable values of the third‐order elastic constants and the pressure derivatives of second‐order elastic constants than those obtained by earlier workers from their somewhat erroneous expressions.