Specific features of electrical conductivity of the insulating phase of vanadium dioxide doped with niobium

被引：5
|
作者：
Andreev, V. N. [1 ]
Klimov, V. A. [1 ]
机构：
[1] Russian Acad Sci, AF Ioffe Phys Tech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia
来源：
PHYSICS OF THE SOLID STATE | 2016年 / 58卷 / 03期
关键词：
SINGLE-CRYSTALS; V1-XNBXO2; SYSTEM; TRANSITION; VO2; TRANSPORT; M2;
D O I：
10.1134/S1063783416030021
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The electrical conductivity of V1 - x Nb (x) O-2 single crystals have been investigated over a wide temperature range covering regions of the existence of the metallic and insulating phases. It has been shown that, with an increase in the niobium concentration, the electrical conductivity of the metallic phase becomes below the Mott limit for the minimum metallic conductivity. Immediately after the metal-insulator transition, the electrical conductivity is determined by a large amount of free electrons that gradually localized with a decrease in the temperature. The temperature dependence of the electrical conductivity in the insulating phase of V1 - x Nb (x) O-2 has been explained in the framework of the hopping conductivity model that takes into account the effect of thermal vibrations of atoms on the resonance integral.
引用
收藏
页码：606 / 610
页数：5
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