Screening of the electron-phonon coupling in Nb-doped SrTiO3.

被引：1

作者：

Jarlborg, T ^{[1
]}

机构：

[1] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1999年 / 13卷 / 29-31期

关键词：

D O I：

10.1142/S0217979299003350

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electronic part of the electron-phonon coupling, lambda, in pure and Nb-doped SrTiO3 has been calculated using the LMTO method. Supercells and the virtual crystal approximation has been used to treat the cases with dilute Nb-doping. It is found that the long-range part of the coupling is only weakly screened for low doping, when the material is close to be insulating. This makes the low-q part of lambda large and can explain the appearance of superconductivity for low Nb concentration.

引用

页码：3525 / 3527

页数：3

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