Vortex guidance and transport in channeled pinning arrays
Abstract
Here, we numerically examine vortices interacting with pinning arrays where a portion of the pinning sites have been removed in order to create coexisting regions of strong and weak pinning. The region without pinning sites acts as an easy-flow channel. For driving in different directions with respect to the channel, we observe distinct types of vortex flow. When the drive is parallel to the channel, the flow first occurs in the pin free region followed by a secondary depinning transition in the pinned region. At high vortex densities there is also an intermediate plastic flow phase due to the coupling between the weak and strong pinning regions. For driving applied perpendicular to the channel, we observe a jammed phase in which vortices accumulate on the boundary of the pinned region due to the vortex-vortex repulsion, while at higher drives the vortices begin to flow through the pinning array. For driving at an angle to the channel, depending on the filling we observe a drive-induced reentrant pinning effect as well as negative differential mobility which occurs when vortices move from the unpinned to the pinned portion of the sample.
- Authors:
-
[1];
[1]
- Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1650639
- Report Number(s):
- LA-UR-19-32592
Journal ID: ISSN 1063-777X; TRN: US2202632
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Low Temperature Physics
- Additional Journal Information:
- Journal Volume: 46; Journal Issue: 4; Journal ID: ISSN 1063-777X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; crystal lattices; fluid flows; hypothetical particles; liquid crystal phases; material science; phase transitions; quantum vortices; reentrant; thermotropic liquid crystals; type ii superconductors; vortex dynamics
Citation Formats
Reichhardt, Charles, and Reichhardt, Cynthia Jane O. Vortex guidance and transport in channeled pinning arrays. United States: N. p., 2020.
Web. doi:10.1063/10.0000860.
Reichhardt, Charles, & Reichhardt, Cynthia Jane O. Vortex guidance and transport in channeled pinning arrays. United States. https://doi.org/10.1063/10.0000860
Reichhardt, Charles, and Reichhardt, Cynthia Jane O. Fri .
"Vortex guidance and transport in channeled pinning arrays". United States. https://doi.org/10.1063/10.0000860. https://www.osti.gov/servlets/purl/1650639.
@article{osti_1650639,
title = {Vortex guidance and transport in channeled pinning arrays},
author = {Reichhardt, Charles and Reichhardt, Cynthia Jane O.},
abstractNote = {Here, we numerically examine vortices interacting with pinning arrays where a portion of the pinning sites have been removed in order to create coexisting regions of strong and weak pinning. The region without pinning sites acts as an easy-flow channel. For driving in different directions with respect to the channel, we observe distinct types of vortex flow. When the drive is parallel to the channel, the flow first occurs in the pin free region followed by a secondary depinning transition in the pinned region. At high vortex densities there is also an intermediate plastic flow phase due to the coupling between the weak and strong pinning regions. For driving applied perpendicular to the channel, we observe a jammed phase in which vortices accumulate on the boundary of the pinned region due to the vortex-vortex repulsion, while at higher drives the vortices begin to flow through the pinning array. For driving at an angle to the channel, depending on the filling we observe a drive-induced reentrant pinning effect as well as negative differential mobility which occurs when vortices move from the unpinned to the pinned portion of the sample.},
doi = {10.1063/10.0000860},
journal = {Low Temperature Physics},
number = 4,
volume = 46,
place = {United States},
year = {Fri Apr 24 00:00:00 EDT 2020},
month = {Fri Apr 24 00:00:00 EDT 2020}
}
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