Electronic structure and structural phase transition in Pb1−xGexTe:Cr under pressure

We investigate galvanomagnetic effects near the insulator-metal transition induced by pressure in Pb1−xGexTe (x=0.10, 0.13) alloys doped with chromium (4.2≤T≤300 K, B≤8 T). We observe nonlinearity in the magnetic field dependencies of Hall voltage and peaks of anomalous scattering in the temperature...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-03, Vol.215 (1), p.012033
Main Authors: Skipetrov, E P, Pichugin, N A, Skipetrova, L A, Slyn'ko, E I, Slyn'ko, V E
Format: Article
Language:English
Subjects:
Chromium
Conduction bands
Conduction model
Current carriers
Electromagnetism
Electronic structure
Galvanomagnetic effects
Hall effect
Magnetic fields
Phase transitions
Physics
Pressure effects
Transition temperature
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Summary:We investigate galvanomagnetic effects near the insulator-metal transition induced by pressure in Pb1−xGexTe (x=0.10, 0.13) alloys doped with chromium (4.2≤T≤300 K, B≤8 T). We observe nonlinearity in the magnetic field dependencies of Hall voltage and peaks of anomalous scattering in the temperature dependencies of resistivity. These are due to the conductivity via chromium impurity band and to the structural phase transition from the cubic NaCl phase to the rhombohedral GeTe phase. Magnetic field dependencies of the Hall coefficient RH(B) are calculated in the framework of two-band conduction model. The main parameters of charge carriers are determined. Pressure dependencies of the critical phase transition temperature are obtained.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/215/1/012033