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Far infrared properties of iron doped single crystal PbTe

P. M. NIKOLIC1,* , D. LUKOVIC1, W. KÖNIG2, M. V. NIKOLIC3, V. BLAGOJEVIC4, S. S. VUJATOVIC1, S. SAVIC1, B. STAMENOVIC1

Affiliation

  1. Institute of Technical Sciences SASA, Knez Mihailova 35/IV, 11000 Belgrade, Serbia
  2. Max Planck Institut für Festkörperforschung, Heisenburgstrasse 1, 7000 Stuttgart 80, Germany
  3. Center for Multidisciplinary Studies of the University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia
  4. Faculty of Electronic Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11000 Belgrade, Serbia

Abstract

Far infrared reflectivity spectra of single crystal PbTe samples doped with 0.2 at% Fe were measured in the temperature range between 10 K and 300 K. These spectra show very sharp and narrow dips below 120 cm-1. The experimental data were numerically analyzed using a fitting procedure based on the plasmon-phonon interaction model. Two local modes were observed. The first one was noted between 130 cm-1 and 170 cm-1 depending on the temperature and the second more frequency stable one was noted at about 230 cm-1..

Keywords

Semiconductors, Far-infrared reflectivity, Plasmon-phonon interaction.

Submitted at: July 19, 2007
Accepted at: Jan. 18, 2008

Citation

P. M. NIKOLIC, D. LUKOVIC, W. KÖNIG, M. V. NIKOLIC, V. BLAGOJEVIC, S. S. VUJATOVIC, S. SAVIC, B. STAMENOVIC, Far infrared properties of iron doped single crystal PbTe, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 1, pp. 145-148 (2008)