Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates
We examine a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field, which induces gyrotropic effects in the charge motion. This system could be realized for Wigner crystals in nanostructured samples, dusty plasmas, or other classical charge-ord...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ad0c85 |
| _version_ | 1797502136922144768 |
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| author | C J O Reichhardt C Reichhardt |
| author_facet | C J O Reichhardt C Reichhardt |
| author_sort | C J O Reichhardt |
| collection | DOAJ |
| description | We examine a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field, which induces gyrotropic effects in the charge motion. This system could be realized for Wigner crystals in nanostructured samples, dusty plasmas, or other classical charge-ordered states where gyrotropic motion and damping can arise. For zero magnetic field, an applied external ac drive can produce a ratchet effect in which the particles move along the easy flow direction of the substrate asymmetry. The zero field ratchet effect can only occur when the ac drive is aligned with the substrate asymmetry direction; however, when a magnetic field is added, the gyrotropic forces generate a Hall effect that leads to a variety of new behaviors, including a transverse ratchet motion that occurs when the ac drive is perpendicular to the substrate asymmetry direction. We show that this system exhibits commensuration effects as well as reversals in the ratchet effect and the Hall angle of the motion. The magnetic field also produces a nonmonotonic ratchet efficiency when the particles become localized at high fields. |
| first_indexed | 2024-03-10T03:28:35Z |
| format | Article |
| id | doaj.art-b8054330574a48ca86640cf493a2f50d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-10T03:28:35Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b8054330574a48ca86640cf493a2f50d2023-11-23T09:46:10ZengIOP PublishingNew Journal of Physics1367-26302023-01-01251111303810.1088/1367-2630/ad0c85Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substratesC J O Reichhardt0https://orcid.org/0000-0002-3487-5089C Reichhardt1https://orcid.org/0000-0002-0193-189XTheoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory , Los Alamos, NM 87545, United States of AmericaTheoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory , Los Alamos, NM 87545, United States of AmericaWe examine a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field, which induces gyrotropic effects in the charge motion. This system could be realized for Wigner crystals in nanostructured samples, dusty plasmas, or other classical charge-ordered states where gyrotropic motion and damping can arise. For zero magnetic field, an applied external ac drive can produce a ratchet effect in which the particles move along the easy flow direction of the substrate asymmetry. The zero field ratchet effect can only occur when the ac drive is aligned with the substrate asymmetry direction; however, when a magnetic field is added, the gyrotropic forces generate a Hall effect that leads to a variety of new behaviors, including a transverse ratchet motion that occurs when the ac drive is perpendicular to the substrate asymmetry direction. We show that this system exhibits commensuration effects as well as reversals in the ratchet effect and the Hall angle of the motion. The magnetic field also produces a nonmonotonic ratchet efficiency when the particles become localized at high fields.https://doi.org/10.1088/1367-2630/ad0c85Wigner crystalratchetnonlinear transport |
| spellingShingle | C J O Reichhardt C Reichhardt Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates New Journal of Physics Wigner crystal ratchet nonlinear transport |
| title | Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| title_full | Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| title_fullStr | Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| title_full_unstemmed | Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| title_short | Magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| title_sort | magnetic field effects and transverse ratchets in charge lattices coupled to asymmetric substrates |
| topic | Wigner crystal ratchet nonlinear transport |
| url | https://doi.org/10.1088/1367-2630/ad0c85 |
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