Superconducting nature of the Bi-II phase of elemental bismuth

The superconductivity in the Bi-II phase of elemental bismuth (transition temperature Tc≃3.92 K at pressure p≃2.80 GPa) was studied experimentally by means of the muon-spin rotation as well as theoretically by using the Eliashberg theory in combination with density functional theory calculations. Ex...

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Bibliographic Details
Published in:Physical review. B 2019-05, Vol.99 (17), p.174506, Article 174506
Main Authors: Khasanov, Rustem, Radonjić, Miloš M., Luetkens, Hubertus, Morenzoni, Elvezio, Simutis, Gediminas, Schönecker, Stephan, Appelt, Wilhelm H., Östlin, Andreas, Chioncel, Liviu, Amato, Alex
Format: Article
Language:English
Subjects:
Bismuth
Critical field (superconductivity)
Density functional theory
Muon spin rotation
Phase transitions
Superconductivity
Transition temperature
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Summary:The superconductivity in the Bi-II phase of elemental bismuth (transition temperature Tc≃3.92 K at pressure p≃2.80 GPa) was studied experimentally by means of the muon-spin rotation as well as theoretically by using the Eliashberg theory in combination with density functional theory calculations. Experiments reveal that Bi-II is a type-I superconductor with a zero temperature value of the thermodynamic critical field Bc(0)≃31.97 mT. The Eliashberg theory approach provides a good agreement with the experimental Tc and the temperature evolution of Bc. The estimated value for the retardation (coupling) parameter kBTc/ωln≈0.07 (ωln is the logarithmically averaged phonon frequency) suggests that Bi-II is an intermediately coupled superconductor.
ISSN:2469-9950
2469-9969
2469-9969
DOI:10.1103/PhysRevB.99.174506