Long-lived circulating currents in strongly correlated nanorings
We study the time-evolving currents flowing in an interacting ring-shaped nanostructure after a bias voltage has been switched on. The source-to-drain current exhibits the expected relaxation towards its quasistatic equilibrium value at a rate Γ_{0} reflecting the lead-induced broadening of the ring...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.1.022006 |
| _version_ | 1797211662934081536 |
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| author | B. M. Schoenauer N. M. Gergs P. Schmitteckert F. Evers D. Schuricht |
| author_facet | B. M. Schoenauer N. M. Gergs P. Schmitteckert F. Evers D. Schuricht |
| author_sort | B. M. Schoenauer |
| collection | DOAJ |
| description | We study the time-evolving currents flowing in an interacting ring-shaped nanostructure after a bias voltage has been switched on. The source-to-drain current exhibits the expected relaxation towards its quasistatic equilibrium value at a rate Γ_{0} reflecting the lead-induced broadening of the ring states. In contrast, the current circulating within the ring decays with a different rate Γ, which is a rapidly decaying function of the interaction strength and thus can take values orders of magnitude below Γ_{0}. This implies the existence of a regime in which the nanostructure is far from equilibrium even though the transmitted current is already stationary. We discuss experimental setups to observe the long-lived ring transients. |
| first_indexed | 2024-04-24T10:30:04Z |
| format | Article |
| id | doaj.art-418125f18add4791860e980596b48a26 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:30:04Z |
| publishDate | 2019-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-418125f18add4791860e980596b48a262024-04-12T16:45:42ZengAmerican Physical SocietyPhysical Review Research2643-15642019-09-011202200610.1103/PhysRevResearch.1.022006Long-lived circulating currents in strongly correlated nanoringsB. M. SchoenauerN. M. GergsP. SchmitteckertF. EversD. SchurichtWe study the time-evolving currents flowing in an interacting ring-shaped nanostructure after a bias voltage has been switched on. The source-to-drain current exhibits the expected relaxation towards its quasistatic equilibrium value at a rate Γ_{0} reflecting the lead-induced broadening of the ring states. In contrast, the current circulating within the ring decays with a different rate Γ, which is a rapidly decaying function of the interaction strength and thus can take values orders of magnitude below Γ_{0}. This implies the existence of a regime in which the nanostructure is far from equilibrium even though the transmitted current is already stationary. We discuss experimental setups to observe the long-lived ring transients.http://doi.org/10.1103/PhysRevResearch.1.022006 |
| spellingShingle | B. M. Schoenauer N. M. Gergs P. Schmitteckert F. Evers D. Schuricht Long-lived circulating currents in strongly correlated nanorings Physical Review Research |
| title | Long-lived circulating currents in strongly correlated nanorings |
| title_full | Long-lived circulating currents in strongly correlated nanorings |
| title_fullStr | Long-lived circulating currents in strongly correlated nanorings |
| title_full_unstemmed | Long-lived circulating currents in strongly correlated nanorings |
| title_short | Long-lived circulating currents in strongly correlated nanorings |
| title_sort | long lived circulating currents in strongly correlated nanorings |
| url | http://doi.org/10.1103/PhysRevResearch.1.022006 |
| work_keys_str_mv | AT bmschoenauer longlivedcirculatingcurrentsinstronglycorrelatednanorings AT nmgergs longlivedcirculatingcurrentsinstronglycorrelatednanorings AT pschmitteckert longlivedcirculatingcurrentsinstronglycorrelatednanorings AT fevers longlivedcirculatingcurrentsinstronglycorrelatednanorings AT dschuricht longlivedcirculatingcurrentsinstronglycorrelatednanorings |