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Effect of Pressure on the Refractive Index and the Band Gap of Cesium Halides
Author(s) -
Johannsen P. G.,
Reiss G.,
Bohle U.,
Holzapfel W. B.
Publication year - 1996
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.2221980113
Subject(s) - refractive index , dielectric , halide , band gap , closure (psychology) , caesium , dielectric function , materials science , density of states , condensed matter physics , optics , chemistry , optoelectronics , physics , inorganic chemistry , economics , market economy
The refractive indexes of CsCl, CsBr, and CsI show a strong nonlinear density dependence. This behaviour can be related to the closure of the band gap by means of a constant‐joint‐density‐of‐states model for the dielectric function. The results are discussed with respect to the dielectric properties of other AB compounds.