Thermal fluctuations and critical current in twinned single crystals

I. B. Khalfin, L. A. Dorosinskii, B. Ya Shapiro

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We study theoretically the depinning processes in twin boundaries in high-Tc superconducting crystals. It is shown that due to the thermodynamic fluctuations of the vortex system pinned in a twin boundary, the critical current can drop to zero at a temperature less than the critical one. There are two contributions to such a process: one is the individual vortex depinning determined by the deformation of a potential well by the current, and the other is the multivortex depinning because of the short-range intervortex interaction.

Original languageEnglish
Pages (from-to)1245-1248
Number of pages4
JournalPhysical Review B
Issue number2
StatePublished - 1995


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