Vortex matter freezing in Bi2Sr2CaCu2O8 samples with a very dense distribution of columnar defects

N. R. Cejas Bolecek, A. B. Kolton, M. Konczykowski, H. Pastoriza, D. Domínguez, and Y. Fasano
Phys. Rev. B 93, 054505 – Published 3 February 2016

Abstract

We show that the dynamical freezing of vortex structures nucleated at diluted densities in Bi2Sr2CaCu2O8 samples with a dense distribution of columnar defects, B102BΦ with BΦ=5kG, results in configurations with liquidlike 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 nonentangled 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.

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  • Received 22 June 2015
  • Revised 22 December 2015

DOI:https://doi.org/10.1103/PhysRevB.93.054505

©2016 American Physical Society

Authors & Affiliations

N. R. Cejas Bolecek1, A. B. Kolton2, M. Konczykowski3, H. Pastoriza1, D. Domínguez2, and Y. Fasano1

  • 1Low Temperature Lab, Centro Atómico Bariloche & Instituto Balseiro, Bariloche, Argentina
  • 2Solid State Theory Group, Centro Atómico Bariloche & Instituto Balseiro, Bariloche, Argentina
  • 3Laboratoire des Solides Irradiés, CNRS UMR 7642 & CEA-DSM-IRAMIS, Ecole Polytechnique, Palaiseau, France

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Issue

Vol. 93, Iss. 5 — 1 February 2016

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