Thermal and quantum creep of vortices trapped by twin boundaries and columnar defects

E. B. Sonin, B. Horovitz

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We have analyzed the creep process in which a vortex loop is disconnecting from a twin boundary or a columnar defect and is then expanding, driven by a transport current. The shape of the vortex loop is in general an arc and not a semicircle. The contact angle α between the loop and the plane of the twin-boundary or the axis of the columnar defect is small if the trapping potential is small. The energy barrier resisting the vortex creep is strongly decreased as α3 for small α. Quantum tunneling through this barrier is analyzed for a massless vortex motion governed by the Magnus force. The tunneling rate W is strongly enhanced for small contact angles with lnW∼α5.

Original languageEnglish
Pages (from-to)6526-6530
Number of pages5
JournalPhysical Review B
Volume51
Issue number10
DOIs
StatePublished - 1 Jan 1995

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