Premium
Effect of Anharmonicity on Urbach's Exponential Tail in Amorphous Semiconductors
Author(s) -
Bhatia K. L.,
Bhat P. K.
Publication year - 1974
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.2220620133
Subject(s) - anharmonicity , amorphous semiconductors , semiconductor , amorphous solid , condensed matter physics , exponential function , materials science , interatomic potential , absorption edge , crystal (programming language) , nonlinear system , absorption (acoustics) , distortion (music) , physics , chemistry , molecular dynamics , computational chemistry , quantum mechanics , crystallography , optoelectronics , mathematics , mathematical analysis , band gap , composite material , computer science , programming language , amplifier , cmos
At the crystal‐glass transition the overall short range order is retained but a distortion exists in the interatomic bonds which introduces a nonlinearity in the interatomic forces. The characteristics of amorphous materials have been studied taking into account the nonlinearity of the interatomic forces. This anharmonicity in amorphous semiconductors is related with the decreased slope of the exponential part of the fundamental optical absorption edge of a semiconductor.