Ab initio theory of magnetic-field-induced odd-frequency two-band superconductivity in MgB2

被引：62

作者：

Aperis, Alex ^{[1
]}

Maldonado, Pablo ^{[1
]}

Oppeneer, Peter M. ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 05期

基金：

瑞典研究理事会;

关键词：

DENSITY; ORIGIN; GAPS;

D O I：

10.1103/PhysRevB.92.054516

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We develop the anisotropic Eliashberg framework for superconductivity in the presence of an applied magnetic field. Using as input the ab initio calculated electron and phonon band structures and electron-phonon coupling, we solve self-consistently the anisotropic Eliashberg equations for the archetypal superconductor MgB2. We find two self-consistent solutions, time-even two-band superconductivity, as well as unconventional time-odd s-wave spin triplet two-band superconductivity emerging with applied field. We provide the full momentum, frequency, and spin-resolved dependence and magnetic field-temperature phase diagrams of the time-even and time-odd superconducting pair amplitudes and predict fingerprints of this novel odd-frequency state in tunneling experiments.

引用

页数：8

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