Strong coupling superconductivity in a quasiperiodic host-guest structure.
Strong coupling superconductivity in a quasiperiodic host-guest structure.
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DOI:
10.1126/sciadv.aao4793
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发表时间:
2018-04
期刊:
影响因子:
13.6
通讯作者:
Grosche FM
中科院分区:
文献类型:
--
作者:
Brown P;Semeniuk K;Wang D;Monserrat B;Pickard CJ;Grosche FM
The quasiperiodic structure of high-pressure bismuth gives rise to unusually strong electron-phonon coupling. 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.
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