Flux line relaxation kinetics following current quenches in disordered type-II superconductors

Chaturvedi, Harshwardhan; Assi, Hiba; Dobramysl, Ulrich; Pleimling, Michel; Täuber, Uwe C.

doi:10.1088/1742-5468/2016/08/083301

Flux line relaxation kinetics following current quenches in disordered type-II superconductors

Journal Article · Fri Aug 19 00:00:00 EDT 2016 · Journal of Statistical Mechanics

DOI:https://doi.org/10.1088/1742-5468/2016/08/083301· OSTI ID:1855177

Chaturvedi, Harshwardhan ^[1]; Assi, Hiba ^[2]; Dobramysl, Ulrich ^[3]; Pleimling, Michel ^[4]; Täuber, Uwe C. ^[4]

Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Virginia Tech, Department of Physics
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Washington and Lee Univ., Lexington, VA (United States)
Univ. of Cambridge (United Kingdom)
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

We investigate the relaxation dynamics of magnetic vortex lines in type-II superconductors following rapid changes of the external driving current by means of an elastic line model simulated with Langevin molecular dynamics. A system of flux vortices in a sample with randomly distributed point-like defects is subjected to an external current of appropriate strength for a sufficient period of time so as to be in a moving non-equilibrium steady state. Here, the current is then instantaneously lowered to a value that pertains to either the moving or pinned regime. The ensuing relaxation of the flux lines is studied via one-time observables such as their mean velocity and radius of gyration. We have in addition measured the two-time flux line height autocorrelation function to investigate dynamical scaling and aging behavior in the system, which in particular emerge after quenches into the glassy pinned state.

View Accepted Manuscript (DOE)

Research Organization:: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0002308

OSTI ID:: 1855177

Alternate ID(s):: OSTI ID: 22729087

Journal Information:: Journal of Statistical Mechanics, Journal Name: Journal of Statistical Mechanics Journal Issue: 8 Vol. 2016; ISSN 1742-5468

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (3)

Critical scaling and aging near the flux-line-depinning transition Chaturvedi, Harshwardhan; Dobramysl, Ulrich; Pleimling, Michel Physical Review B, Vol. 101, Issue 2 https://doi.org/10.1103/physrevb.101.024515	journal	January 2020
Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries Chaturvedi, H.; Galliher, N.; Dobramysl, Ulrich Apollo - University of Cambridge Repository https://doi.org/10.17863/cam.46400	text	January 2019
Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries Chaturvedi, Harshwardhan; Galliher, Nathan; Dobramysl, Ulrich arXiv https://doi.org/10.48550/arxiv.1710.03679	text	January 2017

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