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Ionic and electronic transport in In2S3 studied via perturbed angular correlation spectroscopy |
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| Authors: | Uhrmacher M Aldon L Schaaf P Metzner H Olivier-Fourcade J Jumas J-C |
| Institution: | 1.II. Physikalisches Institut, Universit?t G?ttingen, Bunsenstr. 7-9, D-37073, G?ttingen, Germany ;2.Laboratoire de Physico-chimie des Matériaux Solides, Université de Montpellier 2, F-34095, Montpellier Cedex 5, France ; |
| Abstract: | We report on Perturbed Angular Correlation measurements in polycrystalline In2S3 samples in the temperature range from 8 K to 1000 K where two different crystallographic phases β and α occur. As probes, implanted 111In nuclei have been used. The three observed EFGs are attributed to probes residing substitutionally in the different sulfur-octahedra and -tetrahedra of β-In2S3. A strong damping between 150 K and 300 K has been attributed to EFG fluctuations following the 111In(EC)111Cd decay. The α-phase (above 680 K) is characterized by a different dynamical damping of the perturbation functions, caused by mobile In atoms. Therefore, the semiconductor In2S3 shows, in two different temperature ranges, dynamical PAC-spectra which correspond to different types of mobile charge carriers. Since 111In is a self atom in In2S3, this compound is an ideal substance to study the charge transport phenomena by the PAC technique. This revised version was published online in August 2006 with corrections to the Cover Date. |
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