Experimental evidence for Bose-glass behavior in Bi2Sr2CaCu2O8 crystals with columnar defects

M. Konczykowski, N. Chikumoto, V. M. Vinokur, M. V. Feigelman

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Giant, strongly nonlogarithmic, magnetic relaxation was observed in BSCCO-2212 crystals irradiated with 5.8-GeV Pb ions due to flux pinning in columnar defects. The underlying flux-creep mechanism was identified as a vortex-loop nucleation process proposed by Nelson and Vinokur [Phys. Rev. Lett. 68, 2398 (1992)]. The crossover in the creep regime from depinning from a single rod to variable-range hopping was observed as a function of rod density. Another type of crossover, from combined pinning involving preexisting defects to purely columnar defect pinning, was observed on crossing the irreversibility line of the pristine material.

Original languageEnglish
Pages (from-to)3957-3960
Number of pages4
JournalPhysical Review B
Volume51
Issue number6
DOIs
Publication statusPublished - 1995
Externally publishedYes

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