de Haas–van Alphen Oscillations in a Superconducting State at High Magnetic Fields

Saša Dukan; Zlatko Tešanović

doi:10.1103/PhysRevLett.74.2311

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de Haas–van Alphen Oscillations in a Superconducting State at High Magnetic Fields

Saša Dukan, Zlatko Tešanović

DOI 10.1103/PhysRevLett.74.2311 · Physical Review Letters

T1

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Abstract

Low-temperature quantum oscillations of the de Haas–van Alphen (dHvA) amplitude are shown to persist far below the upper critical field of a strongly type-II superconductor, due to the gapless nature of the BCS quasiparticle spectrum in high fields. The dHvA amplitude in the superconducting state is smaller than its normal state counterpart by the factor ∼[max(T,γ)/Δ]2, where γ is the damping. This factor reflects the presence of a small gapless portion of the Fermi surface, surrounded by regions where the BCS gap is large. The agreement with recent experimental data on V3Si is very good.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
V3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb3Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown