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Superconducting nature of the Bi-II phase of elemental bismuth
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
Univ Belgrade, Inst Phys Belgrade, Sci Comp Lab, Ctr Study Complex Syst, Pregrev 118, Belgrade 11080, Serbia..
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
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2019 (engelsk)Inngår i: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 99, nr 17, artikkel-id 174506Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The superconductivity in the Bi-II phase of elemental bismuth (transition temperature T-c similar or equal to 3.92 K at pressure p similar or equal to 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 B-c(0) similar or equal to 31.97 mT. The Eliashberg theory approach provides a good agreement with the experimental T-c and the temperature evolution of B-c . The estimated value for the retardation (coupling) parameter k(B)T(c)/omega(In) approximate to 0.07 (omega(In) is the logarithmically averaged phonon frequency) suggests that Bi-II is an intermediately coupled superconductor.

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AMER PHYSICAL SOC , 2019. Vol. 99, nr 17, artikkel-id 174506
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URN: urn:nbn:se:kth:diva-252605DOI: 10.1103/PhysRevB.99.174506ISI: 000467722600004OAI: oai:DiVA.org:kth-252605DiVA, id: diva2:1321930
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QC 20190610

Tilgjengelig fra: 2019-06-10 Laget: 2019-06-10 Sist oppdatert: 2019-06-10bibliografisk kontrollert

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