TRANSPORT OF LOCAL PAIRS IN METALLIC OXIDES - CALCULATION OF THE FREQUENCY AND TEMPERATURE-DEPENDENCE OF THE CONDUCTIVITY

被引：4

作者：

SHEKHTER, RI ^{[1
]}

WENDIN, G ^{[1
]}

KULIK, IO ^{[1
]}

机构：

[1] ACAD SCI KHARKOV,INST LOW TEMP PHYS & ENGN,KHARKOV 310164,USSR

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.44.10215

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model of the electronic structure of metal-oxide compounds is applied to the calculation of the oxide conductivity above the superconducting transition. The model takes into account both localized pairs of electrons or holes and itinerant (delocalized) electrons or holes. The magnitude of the estimated conductivity is in accord with experimental results and behaves as a function of temperature as T-2 or T-1 depending on the assumption of weak or strong correlation between the pair occupation fluctuations at different lattice sites. The cutoff frequency for pair conductivity scales linearly with temperature. This compares favorably with a Drude-model analysis of experimental results for the optical conductivity in terms of a scattering rate with linear T dependence.

引用

页码：10215 / 10221

页数：7

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