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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.

SUBMITTER: Brown P

PROVIDER: S-EPMC5898833 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Strong coupling superconductivity in a quasiperiodic host-guest structure.

Brown Philip P Semeniuk Konstantin K Wang Diandian D Monserrat Bartomeu B Pickard Chris J CJ Grosche F Malte FM

Science advances 20180413 4

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 attribut ...[more]

PMID: 29662950

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