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Title: Persistence of pinning and creep beyond critical drive within the strong pinning paradigm

Abstract

Pinning and thermal creep determine the response of numerous systems containing superstructures, e.g., vortices in type II superconductors, domain walls in ferroics, or dislocations in metals. The combination of drive and thermal fluctuations leads to the superstructure's depinning, and its velocity v determines the electric, magnetic, or mechanical response. It is commonly believed that pinning and creep collapse above the critical drive F-c, entailing a sharp rise in the velocity v. We challenge this perception by studying the effects of thermal fluctuations within the framework of strong vortex pinning in type II superconductors. In fact, we show that pinning and thermal creep persist far beyond the critical force. The resulting force-velocity characteristic largely maintains its zero-temperature shape, and thermal creep manifests itself by a downward renormalization of the critical drive. Such characteristics are in agreement with Coulomb's law of dry friction, and they have been often observed in experiments.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Swiss National Science Foundation (SNSF); USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1476722
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 9; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Buchacek, M., Willa, R., Geshkenbein, V. B., and Blatter, G. Persistence of pinning and creep beyond critical drive within the strong pinning paradigm. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.094510.
Buchacek, M., Willa, R., Geshkenbein, V. B., & Blatter, G. Persistence of pinning and creep beyond critical drive within the strong pinning paradigm. United States. doi:10.1103/PhysRevB.98.094510.
Buchacek, M., Willa, R., Geshkenbein, V. B., and Blatter, G. Sat . "Persistence of pinning and creep beyond critical drive within the strong pinning paradigm". United States. doi:10.1103/PhysRevB.98.094510.
@article{osti_1476722,
title = {Persistence of pinning and creep beyond critical drive within the strong pinning paradigm},
author = {Buchacek, M. and Willa, R. and Geshkenbein, V. B. and Blatter, G.},
abstractNote = {Pinning and thermal creep determine the response of numerous systems containing superstructures, e.g., vortices in type II superconductors, domain walls in ferroics, or dislocations in metals. The combination of drive and thermal fluctuations leads to the superstructure's depinning, and its velocity v determines the electric, magnetic, or mechanical response. It is commonly believed that pinning and creep collapse above the critical drive F-c, entailing a sharp rise in the velocity v. We challenge this perception by studying the effects of thermal fluctuations within the framework of strong vortex pinning in type II superconductors. In fact, we show that pinning and thermal creep persist far beyond the critical force. The resulting force-velocity characteristic largely maintains its zero-temperature shape, and thermal creep manifests itself by a downward renormalization of the critical drive. Such characteristics are in agreement with Coulomb's law of dry friction, and they have been often observed in experiments.},
doi = {10.1103/PhysRevB.98.094510},
journal = {Physical Review B},
issn = {2469-9950},
number = 9,
volume = 98,
place = {United States},
year = {2018},
month = {9}
}

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