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Title: Vortex shear banding transitions in superconductors with inhomogeneous pinning arrays

Abstract

Abstract We numerically examine the flow of superconducting vortices in samples containing square pinning arrays in which a band of pins is removed. When a drive is applied at an angle with respect to the band orientation, we find that the vortex depinning initiates in the pin-free channel. The moving vortices form a series of quasi-one-dimensional shear bands that begin flowing in the bulk of the pin-free channel, and the motion gradually approaches the edge of the pinned region. The consecutive depinning of each shear band appears as a series of jumps in the velocity-force curves and as sharp steps in the spatial velocity profiles. When a constant drive is applied parallel to the pin-free channel along with a gradually increasing perpendicular drive, the net vortex velocity decreases in a series of steps that correspond to the immobilization of bands of vortices, and in some cases the flow can drop to zero, creating a field effect transistor phenomenon. These results should also be relevant to other types of systems that exhibit depinning in the presence of inhomogeneous pinning.

Authors:
; ORCiD logo
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1579773
Alternate Identifier(s):
OSTI ID: 1784695
Report Number(s):
LA-UR-19-28414
Journal ID: ISSN 2399-6528
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
Journal of Physics Communications
Additional Journal Information:
Journal Name: Journal of Physics Communications Journal Volume: 3 Journal Issue: 12; Journal ID: ISSN 2399-6528
Publisher:
IOP Publishing
Country of Publication:
United Kingdom
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Material Science

Citation Formats

Reichhardt, C., and Reichhardt, C. J. O. Vortex shear banding transitions in superconductors with inhomogeneous pinning arrays. United Kingdom: N. p., 2019. Web. doi:10.1088/2399-6528/ab5e66.
Reichhardt, C., & Reichhardt, C. J. O. Vortex shear banding transitions in superconductors with inhomogeneous pinning arrays. United Kingdom. https://doi.org/10.1088/2399-6528/ab5e66
Reichhardt, C., and Reichhardt, C. J. O. Wed . "Vortex shear banding transitions in superconductors with inhomogeneous pinning arrays". United Kingdom. https://doi.org/10.1088/2399-6528/ab5e66.
@article{osti_1579773,
title = {Vortex shear banding transitions in superconductors with inhomogeneous pinning arrays},
author = {Reichhardt, C. and Reichhardt, C. J. O.},
abstractNote = {Abstract We numerically examine the flow of superconducting vortices in samples containing square pinning arrays in which a band of pins is removed. When a drive is applied at an angle with respect to the band orientation, we find that the vortex depinning initiates in the pin-free channel. The moving vortices form a series of quasi-one-dimensional shear bands that begin flowing in the bulk of the pin-free channel, and the motion gradually approaches the edge of the pinned region. The consecutive depinning of each shear band appears as a series of jumps in the velocity-force curves and as sharp steps in the spatial velocity profiles. When a constant drive is applied parallel to the pin-free channel along with a gradually increasing perpendicular drive, the net vortex velocity decreases in a series of steps that correspond to the immobilization of bands of vortices, and in some cases the flow can drop to zero, creating a field effect transistor phenomenon. These results should also be relevant to other types of systems that exhibit depinning in the presence of inhomogeneous pinning.},
doi = {10.1088/2399-6528/ab5e66},
journal = {Journal of Physics Communications},
number = 12,
volume = 3,
place = {United Kingdom},
year = {2019},
month = {12}
}

Journal Article:
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