Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework
We study a model of a thermoelectric nanojunction driven by vibrationally-assisted tunnelling. We apply the reaction coordinate formalism to derive a master equation governing its thermoelectric performance beyond the weak electron-vibrational coupling limit. Employing full counting statistics we ca...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac4ce3 |
| _version_ | 1797748621020495872 |
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| author | Conor McConnell Ahsan Nazir |
| author_facet | Conor McConnell Ahsan Nazir |
| author_sort | Conor McConnell |
| collection | DOAJ |
| description | We study a model of a thermoelectric nanojunction driven by vibrationally-assisted tunnelling. We apply the reaction coordinate formalism to derive a master equation governing its thermoelectric performance beyond the weak electron-vibrational coupling limit. Employing full counting statistics we calculate the current flow, thermopower, associated noise, and efficiency without resorting to the weak vibrational coupling approximation. We demonstrate intricacies of the power-efficiency-precision trade-off at strong coupling, showing that the three cannot be maximised simultaneously in our model. Finally, we emphasise the importance of capturing non-additivity when considering strong coupling and multiple environments, demonstrating that an additive treatment of the environments can violate the upper bound on thermoelectric efficiency imposed by Carnot. |
| first_indexed | 2024-03-12T16:07:25Z |
| format | Article |
| id | doaj.art-48fb1f6d7a304c3ca10039fa804c81b9 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:07:25Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-48fb1f6d7a304c3ca10039fa804c81b92023-08-09T14:17:21ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124202500210.1088/1367-2630/ac4ce3Strong coupling in thermoelectric nanojunctions: a reaction coordinate frameworkConor McConnell0Ahsan Nazir1https://orcid.org/0000-0003-4099-1868Department of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL, United KingdomDepartment of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL, United KingdomWe study a model of a thermoelectric nanojunction driven by vibrationally-assisted tunnelling. We apply the reaction coordinate formalism to derive a master equation governing its thermoelectric performance beyond the weak electron-vibrational coupling limit. Employing full counting statistics we calculate the current flow, thermopower, associated noise, and efficiency without resorting to the weak vibrational coupling approximation. We demonstrate intricacies of the power-efficiency-precision trade-off at strong coupling, showing that the three cannot be maximised simultaneously in our model. Finally, we emphasise the importance of capturing non-additivity when considering strong coupling and multiple environments, demonstrating that an additive treatment of the environments can violate the upper bound on thermoelectric efficiency imposed by Carnot.https://doi.org/10.1088/1367-2630/ac4ce3thermoelectricstrong couplingopen quantum systemsquantum thermodynamics |
| spellingShingle | Conor McConnell Ahsan Nazir Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework New Journal of Physics thermoelectric strong coupling open quantum systems quantum thermodynamics |
| title | Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework |
| title_full | Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework |
| title_fullStr | Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework |
| title_full_unstemmed | Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework |
| title_short | Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework |
| title_sort | strong coupling in thermoelectric nanojunctions a reaction coordinate framework |
| topic | thermoelectric strong coupling open quantum systems quantum thermodynamics |
| url | https://doi.org/10.1088/1367-2630/ac4ce3 |
| work_keys_str_mv | AT conormcconnell strongcouplinginthermoelectricnanojunctionsareactioncoordinateframework AT ahsannazir strongcouplinginthermoelectricnanojunctionsareactioncoordinateframework |