On the resonant level of chromium in the rhombohedral and cubic phases of Pb{sub 1-x-y}Ge{sub x}Cr{sub y}Te alloys

Journal Article · Sat Jun 15 00:00:00 EDT 2013 · Semiconductors

DOI:https://doi.org/10.1134/S1063782613060262· OSTI ID:22126521

Pichugin, N. A. ^[1]; Slyn'ko, E. I.; Slyn'ko, V. E. ^[2]

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1. Moscow State University (Russian Federation)
2. National Academy of Sciences of Ukraine, Institute of Materials Science Problems (Chernivtsy Branch) (Ukraine)

The temperature dependences of the Hall coefficient (4.2 K {<=} T {<=} 300 K, B {<=} 0.07 T) in Pb{sub 1-x-y}Ge{sub x}Cr{sub y}Te alloys (x = 0.03-0.08, y {<=} 0.01) are studied. An increase in the absolute value of the Hall coefficient with an increase in temperature is found. This fact is indicative of a decrease in the concentration of free electrons as a result of the motion of the resonant level of chromium stabilizing the Fermi level relative to the conduction-band bottom. The temperature dependences of the Hall coefficient, in satisfactory agreement with the experimental ones, are calculated in the context of the two-band Kane dispersion law allowing for the structural phase transition upon increasing temperature. The energy position and temperature coefficients of the motion of the resonant level of chromium relative to the middle of the band gap in the rhombohedral and cubic phases are determined.

• OSTI ID: 22126521
• Journal Information: Semiconductors, Vol. 47, Issue 6; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
CONCENTRATION RATIO
CUBIC LATTICES
DISPERSIONS
ELECTRONS
FERMI LEVEL
GERMANIUM ALLOYS
LEAD ALLOYS
PHASE TRANSFORMATIONS
TELLURIUM ALLOYS
TEMPERATURE COEFFICIENT
TEMPERATURE DEPENDENCE
TRIGONAL LATTICES