Peak effect in superconductors: Melting of Larkin domains

Chao Tang; Xinsheng Ling; S. Bhattacharya; P. M. Chaikin

doi:10.1209/epl/i1996-00157-x

Peak effect in superconductors: Melting of Larkin domains

Chao Tang, Xinsheng Ling, S. Bhattacharya, P. M. Chaikin

Research output: Contribution to journal › Article › peer-review

Abstract

Motivated by the recent observations of the peak effect in high-T_c YBCO superconductors, we re-examine the origin of this unusual phenomenon. We propose that the sharp peak in the critical current as a function of temperature or magnetic field is an interesting manifestation of vortex-lattice melting in the presence of weak random pinning. Specifically, the rise of the critical current with increasing temperature or field is a result of a crossover from the Larkin pinning length to a length scale set by thermal fluctuations.

Original language	English (US)
Pages (from-to)	597-602
Number of pages	6
Journal	Europhysics Letters
Volume	35
Issue number	8
DOIs	https://doi.org/10.1209/epl/i1996-00157-x
State	Published - Sep 10 1996

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "Motivated by the recent observations of the peak effect in high-Tc YBCO superconductors, we re-examine the origin of this unusual phenomenon. We propose that the sharp peak in the critical current as a function of temperature or magnetic field is an interesting manifestation of vortex-lattice melting in the presence of weak random pinning. Specifically, the rise of the critical current with increasing temperature or field is a result of a crossover from the Larkin pinning length to a length scale set by thermal fluctuations.",

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AU - Tang, Chao

AU - Ling, Xinsheng

AU - Bhattacharya, S.

AU - Chaikin, P. M.

PY - 1996/9/10

Y1 - 1996/9/10

N2 - Motivated by the recent observations of the peak effect in high-Tc YBCO superconductors, we re-examine the origin of this unusual phenomenon. We propose that the sharp peak in the critical current as a function of temperature or magnetic field is an interesting manifestation of vortex-lattice melting in the presence of weak random pinning. Specifically, the rise of the critical current with increasing temperature or field is a result of a crossover from the Larkin pinning length to a length scale set by thermal fluctuations.

AB - Motivated by the recent observations of the peak effect in high-Tc YBCO superconductors, we re-examine the origin of this unusual phenomenon. We propose that the sharp peak in the critical current as a function of temperature or magnetic field is an interesting manifestation of vortex-lattice melting in the presence of weak random pinning. Specifically, the rise of the critical current with increasing temperature or field is a result of a crossover from the Larkin pinning length to a length scale set by thermal fluctuations.

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JO - Europhysics Letters

JF - Europhysics Letters

IS - 8

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Peak effect in superconductors: Melting of Larkin domains

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