Calculated Nb superconducting transition temperature under hydrostatic pressure

被引：12
|
作者：
Ostanin, SA
Trubitsin, VY
Savrasov, SY
Alouani, M
Dreyssé, H
机构：
[1] GEMME, IPCMS, F-67037 Strasbourg, France
[2] RAS, Ural Branch, Physicotech Inst, Izhevsk 426001, Russia
[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2000年 / 17卷 / 2-4期
关键词：
Nb; superconductivity; high pressure;
D O I：
10.1016/S0927-0256(00)00024-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A full-potential linear muffin-tin orbital method (FP-LMTO) based linear-response approach is used to calculate the electron-phonon coupling in Nh under hydrostatic pressure. The superconducting transition temperature T-c is calculated using the Eliashberg equation. The calculated T-c agrees nicely with the experimental result at ambient pressure, but the agreement is only fair at high pressures. The T-c measured anomaly at 60-70 GPa is understood in terms of the 2.5-order Lifshitz transition and its origin is traced back to the qualitative changes in the Fermi surface topology. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：202 / 205
页数：4
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