Regensburg 2000 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 27: Poster II: SiC (1-7), Ultrakurzzeitdynamik (8-15), Halbleiterlaser (16-20), GaN (21-38), III-V Halbleiter (39-56), Photovoltaik (57-64), Störstellen (65-68), Tern
äre Halbleiter (69-70)
HL 27.70: Poster
Mittwoch, 29. März 2000, 14:00–19:00, A
Investigation of cation-disorder effects in the spinel-type semiconductors CdIn2S4 and FeIn2S4 — •Igor Burlakov1, Vyacheslav Samokhvalov1, Sepp Unterricker1, Andrei Sarua2, Marc Dietrich3, Viktor Tezlevan4, and Ruslan Cojocaru4 — 1Institut für Angewandte Physik, TU Bergakademie Freiberg, D-09596 Freiberg/Sachsen — 2Institut für Theoretische Physik, TU Bergakademie Freiberg, D-09596 Freiberg/Sachsen — 3Fakultät für Physik, Universität Konstanz, D-78457 Konstanz — 4Technical University of Moldova, 2004 Chisinau, Moldova
CdIn2S4 and FeIn2S4 are ternary semiconductors, which crystallize in the spinel structure. Such substances are promising materials for laser and optoelectronic applications. We used the nuclear spectroscopic methods perturbed angular correlation (PAC) and Moessbauer effect (ME) to investigate order-disorder transitions in the cation sublattice of these compounds on a microscopic scale. Thereby the probes 111In(111Cd) and 111Ag(111Cd) were used for PAC, as well as 57Fe for ME. The results are compared with those of Raman spectroscopy, which is sensitive to long-range symmetry changes. The influence of different thermal treatments will be discussed. Besides, the theoretically determined electric field gradients of these substances will be compared with the experimental ones.
I. Burlakov is a A.v. Humboldt fellow from Institute of Applied Physics, Kishinev, Moldova