Enhancing superconductivity with resonant antishielding and topological plasmon-polarons

被引：0

作者：

Kempa, Krzysztof ^{[1
]}

Protik, Nakib H. ^{[2
,3
]}

Dodge, Tyler ^{[1
]}

Draxl, Claudia ^{[2
,3
]}

Naughton, Michael J. ^{[1
]}

机构：

[1] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[2] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[3] Humboldt Univ, IRIS Adlershof, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 18期

关键词：

VIBRATIONS;

D O I：

10.1103/PhysRevB.107.184518

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By employing ab initio Migdal-Eliashberg calculations, we predict a fourfold enhancement of the supercon-ducting critical temperature of MgB2 when proximity-coupled to the topological crystal Bi2Se3. We support this result with calculations using the general Leavens scaling method. We show that this effect is a result of dynamic resonant antishielding of Cooper pairs by plasmon-polarons of Dirac electrons in the topological crystal. Our calculations show that such superconductivity enhancement varies strongly with Coulomb coupling between plasmon-polarons and Cooper pairs, with a pronounced maximum of Tc at a critical value of the coupling parameter. This feature is universal, and so can occur in other superconductor-topological crystal combinations, including with nonphonon mediated superconductors. We discuss methods to experimentally optimize the key coupling parameter.

引用

页数：5