Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors

H. Jiang*, A. Widom, Yonggang Huang, T. Yuan, C. Vittoria, D. B. Chrisey, J. S. Horwitz

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Vortex-ring nucleation by thermal activation and quantum-tunneling processes in high-Tc superconductors is discussed. The nonlinear resistance scales as e1/2-(J/J)1/2. Thermal activation yields a critical index of 1/2=1, while quantum tunneling (without normal current dissipation) yields a critical index of 1/2=2. Current-voltage characteristics were measured on both disordered (low-Jc), ordered (c axis normal to the film plane, high-Jc) Y-Ba-Cu-O films, and microbridges below Tc. The data were examined in terms of both thermal-activation and quantum-nucleation models. For the disordered films, the 1/2=1 scaling law is in reasonable agreement with data, while 1/2=2 scaling is required to explain the results of the ordered films at low temperatures. For the microbridges, the 1/2=2 scaling extends even to high temperatures.

Original languageEnglish (US)
Pages (from-to)3048-3053
Number of pages6
JournalPhysical Review B
Volume45
Issue number6
DOIs
StatePublished - Jan 1 1992

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vortex rings
nucleation
activation
scaling
scaling laws
dissipation
electric potential

ASJC Scopus subject areas

  • Condensed Matter Physics

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Jiang, H., Widom, A., Huang, Y., Yuan, T., Vittoria, C., Chrisey, D. B., & Horwitz, J. S. (1992). Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors. Physical Review B, 45(6), 3048-3053. https://doi.org/10.1103/PhysRevB.45.3048
Jiang, H. ; Widom, A. ; Huang, Yonggang ; Yuan, T. ; Vittoria, C. ; Chrisey, D. B. ; Horwitz, J. S. / Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors. In: Physical Review B. 1992 ; Vol. 45, No. 6. pp. 3048-3053.
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Jiang, H, Widom, A, Huang, Y, Yuan, T, Vittoria, C, Chrisey, DB & Horwitz, JS 1992, 'Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors', Physical Review B, vol. 45, no. 6, pp. 3048-3053. https://doi.org/10.1103/PhysRevB.45.3048

Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors. / Jiang, H.; Widom, A.; Huang, Yonggang; Yuan, T.; Vittoria, C.; Chrisey, D. B.; Horwitz, J. S.

In: Physical Review B, Vol. 45, No. 6, 01.01.1992, p. 3048-3053.

Research output: Contribution to journalArticle

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AU - Huang, Yonggang

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AU - Chrisey, D. B.

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