Strong coupling superconductivity in a quasiperiodic host-guest structure.

Abstract:

:We examine the low-temperature states supported by the quasiperiodic host-guest structure of elemental bismuth at high pressure, Bi-III. Our electronic transport and magnetization experiments establish Bi-III as a rare example of type II superconductivity in an element, with a record upper critical field of ~ 2.5 T, unusually strong electron-phonon coupling, and an anomalously large, linear temperature dependence of the electrical resistivity in the normal state. These properties may be attributed to the peculiar phonon spectrum of incommensurate host-guest structures, which exhibit additional quasi-acoustic sliding modes, suggesting a pathway toward strong coupling superconductivity with the potential for enhanced transition temperatures and high critical fields.

journal_name

Sci Adv

journal_title

Science advances

authors

Brown P,Semeniuk K,Wang D,Monserrat B,Pickard CJ,Grosche FM

doi

10.1126/sciadv.aao4793

subject

Has Abstract

pub_date

2018-04-13 00:00:00

pages

eaao4793

issue

4

issn

2375-2548

pii

aao4793

journal_volume

4

pub_type

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