Multiband full-bandwidth anisotropic Eliashberg theory of interfacial electron-phonon coupling and high-Tc superconductivity in FeSe/SrTiO3

被引：36

作者：

Aperis, Alex ^{[1
]}

Oppeneer, Peter M. ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, POB 516, SE-75120 Uppsala, Sweden

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 06期

基金：

瑞典研究理事会;

关键词：

SINGLE-LAYER FESE; HIGH-TEMPERATURE SUPERCONDUCTIVITY; ORIGIN; FILMS; MODE;

D O I：

10.1103/PhysRevB.97.060501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We examine the impact of interfacial phonons on the superconducting state of FeSe/SrTiO3 developing a material's specific multiband, full bandwidth, and anisotropic Eliashberg theory for this system. Our self-consistent calculations highlight the importance of the interfacial electron-phonon interaction, which is hidden behind the seemingly weak-coupling constant lambda(m) = 0.4, in mediating the high T-c, and explain other puzzling experimental observations, such as the s-wave symmetry and replica bands. We discover that the formation of replica bands has a T-c decreasing effect that is nevertheless compensated by deep Fermi-sea Cooper pairing which has a T-c enhancing effect. We predict a strong-coupling dip-hump signature in the tunneling spectra due to the interfacial coupling.

引用

页数：6

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