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Title: Parrallel magnetic field suppresses dissipation in superconducting nanostrips

The motion of Abrikosov vortices in type-II superconductors results in a finite resistance in the presence of an applied electric current. Elimination or reduction of the resistance via immobilization of vortices is the "holy grail" of superconductivity research. Common wisdom dictates that an increase in the magnetic field escalates the loss of energy since the number of vortices increases. Here we show that this is no longer true if the magnetic field and the current are applied parallel to each other. Our experimental studies on the resistive behavior of a superconducting Mo0.79Ge0.21 nanostrip reveal the emergence of a dissipative state with increasing magnetic field, followed by a pronounced resistance drop, signifying a reentrance to the superconducting state. Large-scale simulations of the 3D time-dependent Ginzburg-Landau model indicate that the intermediate resistive state is due to an unwinding of twisted vortices. When the magnetic field increases, this instability is suppressed due to a better accommodation of the vortex lattice to the pinning configuration. Our findings show that magnetic field and geometrical confinement can suppress the dissipation induced by vortex motion and thus radically improve the performance of superconducting materials.
Authors:
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 114; Journal Issue: 48
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; USDOE Office of Science - Office of Advanced Scientific Computing Research; National Science Foundation (NSF); USDOE
Country of Publication:
United States
Language:
English
Subject:
nanostrips; parallel magnetic field; reentrant superconductivity; vortex
OSTI Identifier:
1408569
Alternate Identifier(s):
OSTI ID: 1474152

Crabtree, George W. Parrallel magnetic field suppresses dissipation in superconducting nanostrips. United States: N. p., Web. doi:10.1073/pnas.1619550114.
Crabtree, George W. Parrallel magnetic field suppresses dissipation in superconducting nanostrips. United States. doi:10.1073/pnas.1619550114.
Crabtree, George W. 2017. "Parrallel magnetic field suppresses dissipation in superconducting nanostrips". United States. doi:10.1073/pnas.1619550114.
@article{osti_1408569,
title = {Parrallel magnetic field suppresses dissipation in superconducting nanostrips},
author = {Crabtree, George W},
abstractNote = {The motion of Abrikosov vortices in type-II superconductors results in a finite resistance in the presence of an applied electric current. Elimination or reduction of the resistance via immobilization of vortices is the "holy grail" of superconductivity research. Common wisdom dictates that an increase in the magnetic field escalates the loss of energy since the number of vortices increases. Here we show that this is no longer true if the magnetic field and the current are applied parallel to each other. Our experimental studies on the resistive behavior of a superconducting Mo0.79Ge0.21 nanostrip reveal the emergence of a dissipative state with increasing magnetic field, followed by a pronounced resistance drop, signifying a reentrance to the superconducting state. Large-scale simulations of the 3D time-dependent Ginzburg-Landau model indicate that the intermediate resistive state is due to an unwinding of twisted vortices. When the magnetic field increases, this instability is suppressed due to a better accommodation of the vortex lattice to the pinning configuration. Our findings show that magnetic field and geometrical confinement can suppress the dissipation induced by vortex motion and thus radically improve the performance of superconducting materials.},
doi = {10.1073/pnas.1619550114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 48,
volume = 114,
place = {United States},
year = {2017},
month = {11}
}