Discontinuity of the phonon mode frequency temperature dependence caused by a zero-gap state in HgCdTe alloys
|Józef Cebulski 1, Augusto Marcelli 1,2, Eugen M. Sheregii 1, M Piccinini 2|
1. University of Rzeszow, Institute of Physics, Rejtana 16, Rzeszów 35-310, Poland
Quasi-binary alloy HgCdTe (MCT) form a continuous series of solid solutions of
In this work are presented experimental results of optical reflectivity in far-infrared region (FIR) in wide interval of temperature (from 10 K to 290 K with step 10 K) for sample of Hg1-xCdxTe (x=0.115). For observation of effects described above a synchrotron radiation FIR source has a great advantage as compared with the classical sources, intensity of which drops abruptly in this spectral region. Obtained results evidently show that frequencies of optical phonon modes have discontinuity in their temperature dependence when the zero-gap state takes place.
1.R. Dornhaus and G. Nimtz, Narrow Gap Semiconductors, Springer-Verlag, Berlin 1985, v. 98, p. 159.
Presentation: Poster at E-MRS Fall Meeting 2008, Symposium J, by Eugen M. Sheregii
See On-line Journal of E-MRS Fall Meeting 2008
Submitted: 2008-05-13 07:58 Revised: 2009-06-07 00:48
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