Fundamental and second-order phonon processes in CdTe and ZnTe
Publication: Research - peer-review › Journal article – Annual report year: 2001
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Fundamental and second-order phonon processes in CdTe and ZnTe. / Schall, M.; Walther, M.; Jepsen, Peter Uhd.
In: Physical Review B, Vol. 64, No. 9, 01.09.2001.Publication: Research - peer-review › Journal article – Annual report year: 2001
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TY - JOUR
T1 - Fundamental and second-order phonon processes in CdTe and ZnTe
A1 - Schall,M.
A1 - Walther,M.
A1 - Jepsen,Peter Uhd
AU - Schall,M.
AU - Walther,M.
AU - Jepsen,Peter Uhd
PY - 2001/9/1
Y1 - 2001/9/1
N2 - Fundamental and higher-order photon-phonon interactions dominate the far infrared absorption and dispersion spectrum of most semiconductors and dielectrics. We present a detailed investigation of the temperature dependence of the dielectric function of the important II-VI semiconductors CdTe and ZnTe in the frequency range below 3 THz, between 10 and 300 K. From the dielectric function we determine the temperature dependence of the fundamental trans verse-optical (TO) frequency in CdTe and ZnTe as well as the TO phonon damping rate in CdTe, and the dynamic ionic charge of both crystals is infer-red from the measurements. Furthermore, our experimental data enable unambiguous assignment of low-frequency absorption bands to sum and difference combinations of fundamental phonon modes at critical points away from the Brillouin zone center.
AB - Fundamental and higher-order photon-phonon interactions dominate the far infrared absorption and dispersion spectrum of most semiconductors and dielectrics. We present a detailed investigation of the temperature dependence of the dielectric function of the important II-VI semiconductors CdTe and ZnTe in the frequency range below 3 THz, between 10 and 300 K. From the dielectric function we determine the temperature dependence of the fundamental trans verse-optical (TO) frequency in CdTe and ZnTe as well as the TO phonon damping rate in CdTe, and the dynamic ionic charge of both crystals is infer-red from the measurements. Furthermore, our experimental data enable unambiguous assignment of low-frequency absorption bands to sum and difference combinations of fundamental phonon modes at critical points away from the Brillouin zone center.
U2 - 10.1103/PhysRevB.64.094301
DO - 10.1103/PhysRevB.64.094301
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 9
VL - 64
ER -