Quantum tunneling of vortices in cuprate and heavy Fermion superconductors

Journal Article · Fri Apr 01 00:00:00 EST 1994 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00754953· OSTI ID:102577

Mota, A C; Aupke, K; Amann, A; Teruzzi, T; Visani, P; Pollini, A ^[1]

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1. Laboratorium fuer Festkoerperphysik, Zuerich (Switzerland)

In high-T{sub c} and in heavy fermion superconductors at low enough temperatures, pinned vortices move from one potential well to another mainly by quantum tunneling. In the superconducting cuprates, the measured creep rates at low magnetic induction and in the T {yields} 0 limit are in excellent agreement with the values calculated within the framework of the Quantum Collective Creep theory. In the heavy fermion superconductor UPt{sub 3}, the measured rates at T {yields} 0 are much higher than the theoretical values, giving evidence that the low temperature motion of vortices in this material is possibly related to its unconventional character.

• Sponsoring Organization: USDOE
• OSTI ID: 102577
• Report Number(s): CONF-9309321-; ISSN 0022-2291; TRN: 95:019725
• Journal Information: Journal of Low Temperature Physics, Vol. 95, Issue 1-2; Conference: International workshop on cuprate and heavy fermion superconductors, Cologne (Germany), 27-30 Sep 1993; Other Information: PBD: Apr 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNETIC FLUX
TUNNEL EFFECT
DYNAMICS
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
URANIUM COMPOUNDS
PLATINUM COMPOUNDS