Critical behavior associated with transient dynamics near the depinning transition
We study the general phenomenon of plastic depinning using a vortex system confined in a Corbino-disc superconductor. For an ordered initial vortex configuration, the vortices driven by a suddenly applied dc current (force) are gradually pinned to random pinning centers, indicating dynamic disorderi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2012-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/14/12/123021 |
| _version_ | 1797751623305396224 |
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| author | S Okuma A Motohashi |
| author_facet | S Okuma A Motohashi |
| author_sort | S Okuma |
| collection | DOAJ |
| description | We study the general phenomenon of plastic depinning using a vortex system confined in a Corbino-disc superconductor. For an ordered initial vortex configuration, the vortices driven by a suddenly applied dc current (force) are gradually pinned to random pinning centers, indicating dynamic disordering. This is detected from the decaying of voltage V ( t ) (mean velocity) toward a steady-state value V ^∞ . On the other hand, when the initial configuration is disordered, a gradual increase of V ( t ) toward V ^∞ is observed, reflecting dynamic ordering. In both cases, relaxation times to reach the steady state exhibit a power-law divergence at the depinning current. Our results clearly show that the transient response depends on the initial vortex configurations: however, the transient time as well as the final mean vortex velocity only depends on the applied current, and the critical behaviors of the depinning transition are identical. To the best of our knowledge, this work is the first to demonstrate this fact predicted by numerical simulations and other more indirect experiments (e.g. Pérez Daroca et al 2011 Phys. Rev . B 84 012508). |
| first_indexed | 2024-03-12T16:51:13Z |
| format | Article |
| id | doaj.art-03bab5515c954367b2442001da284bfe |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:51:13Z |
| publishDate | 2012-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-03bab5515c954367b2442001da284bfe2023-08-08T11:09:15ZengIOP PublishingNew Journal of Physics1367-26302012-01-01141212302110.1088/1367-2630/14/12/123021Critical behavior associated with transient dynamics near the depinning transitionS Okuma0A Motohashi1Department of Physics and Research Center for Low Temperature Physics, Tokyo Institute of Technology , 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8551, JapanDepartment of Physics and Research Center for Low Temperature Physics, Tokyo Institute of Technology , 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8551, JapanWe study the general phenomenon of plastic depinning using a vortex system confined in a Corbino-disc superconductor. For an ordered initial vortex configuration, the vortices driven by a suddenly applied dc current (force) are gradually pinned to random pinning centers, indicating dynamic disordering. This is detected from the decaying of voltage V ( t ) (mean velocity) toward a steady-state value V ^∞ . On the other hand, when the initial configuration is disordered, a gradual increase of V ( t ) toward V ^∞ is observed, reflecting dynamic ordering. In both cases, relaxation times to reach the steady state exhibit a power-law divergence at the depinning current. Our results clearly show that the transient response depends on the initial vortex configurations: however, the transient time as well as the final mean vortex velocity only depends on the applied current, and the critical behaviors of the depinning transition are identical. To the best of our knowledge, this work is the first to demonstrate this fact predicted by numerical simulations and other more indirect experiments (e.g. Pérez Daroca et al 2011 Phys. Rev . B 84 012508).https://doi.org/10.1088/1367-2630/14/12/123021 |
| spellingShingle | S Okuma A Motohashi Critical behavior associated with transient dynamics near the depinning transition New Journal of Physics |
| title | Critical behavior associated with transient dynamics near the depinning transition |
| title_full | Critical behavior associated with transient dynamics near the depinning transition |
| title_fullStr | Critical behavior associated with transient dynamics near the depinning transition |
| title_full_unstemmed | Critical behavior associated with transient dynamics near the depinning transition |
| title_short | Critical behavior associated with transient dynamics near the depinning transition |
| title_sort | critical behavior associated with transient dynamics near the depinning transition |
| url | https://doi.org/10.1088/1367-2630/14/12/123021 |
| work_keys_str_mv | AT sokuma criticalbehaviorassociatedwithtransientdynamicsnearthedepinningtransition AT amotohashi criticalbehaviorassociatedwithtransientdynamicsnearthedepinningtransition |