On the resonant level of chromium in the rhombohedral and cubic phases of Pb1-x-yGexCryTe alloys

被引：14

作者：

Skipetrov, E. P. ^{[1
]}

Pichugin, N. A. ^{[1
]}

Slyn'ko, E. I. ^{[2
]}

Slyn'ko, V. E. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[2] Natl Acad Sci Ukraine, Inst Mat Sci Problems, Chernivtsy Branch, UA-58001 Chernovtsy, Ukraine

来源：

SEMICONDUCTORS | 2013年 / 47卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

DILUTED MAGNETIC SEMICONDUCTORS; LEAD-TELLURIDE; ELECTRONIC-STRUCTURE; SOLID-SOLUTIONS; PBTE; TRANSITION; STATES; IMPURITIES; TRANSPORT;

D O I：

10.1134/S1063782613060262

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature dependences of the Hall coefficient (4.2 K a parts per thousand currency sign T a parts per thousand currency sign 300 K, B a parts per thousand currency sign 0.07 T) in Pb1 - x - y Ge (x) Cr (y) Te alloys (x = 0.03-0.08, y a parts per thousand currency sign 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.

引用

页码：729 / 735

页数：7

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