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 Advjournal_title
Science advancesauthors
Brown P,Semeniuk K,Wang D,Monserrat B,Pickard CJ,Grosche FMdoi
10.1126/sciadv.aao4793subject
Has Abstractpub_date
2018-04-13 00:00:00pages
eaao4793issue
4issn
2375-2548pii
aao4793journal_volume
4pub_type
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