Vortex matter freezing in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8}$ samples with a very dense distribution of columnar defects

N. R. Cejas Bolecek; A. B. Kolton; M. Konczykowski; H. Pastoriza; D. Domínguez; Y. Fasano

doi:10.1103/PhysRevB.93.054505

paper

Vortex matter freezing in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ samples with a very dense distribution of columnar defects

arXiv:1602.02784 · doi:10.1103/PhysRevB.93.054505

Abstract

We show that the dynamical freezing of vortex structures nucleated at diluted densities in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ samples with a dense distribution of columnar defects, $B \sim 1 0^{- 2} B_{Φ}$ with $B_{Φ} = 5$ \,kG, results in configurations with liquid-like correlations. We propose a freezing model considering a relaxation dynamics dominated by double-kink excitations driven by the local stresses obtained directly from experimental images. With this model we estimate the relaxation barrier and the freezing temperature. We argue that the low-field frozen vortex structures nucleated in a dense distribution of columnar defects thus correspond to an out-of-equilibrium non-entangled liquid with strongly reduced mobility rather than to a snapshot of a metastable state with divergent activation barriers as for instance expected for the Bose-glass phase at equilibrium.

12 pages, 7 figures

Vortex matter freezing in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ samples with a very dense distribution of columnar defects

Abstract

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Vortex matter freezing in Bi2​Sr2​CaCu2​O8​ samples with a very dense distribution of columnar defects

Abstract

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Cited by in corpus (10)

Vortex matter freezing in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ samples with a very dense distribution of columnar defects