Charge and heat pumping in the Rice-Mele chain at finite temperature
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913675275665408 |
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| author | Roura-Bas, P. Aligia, A. A. |
| author_facet | Roura-Bas, P. Aligia, A. A. |
| contents | It is well known that quantized topological charge pumping takes place in the half filled Rice-Mele chain performing a closed cycle in parameter space. We extend previous studies to the case of charge and heat transport at arbitrary filling and temperature using the corresponding continuity equation with focus in the non-interacting case. The amount of charge and heat transported for any adiabatic time dependence of the parameters is given by a double integral of an analytical function. We find that quantized transport is lost except in trivial cases. In particular, for popular pumping circuits used which lead to quantized non-trivial charge transport at zero temperature, the heat transported in the cycle vanishes. For other pumping circuits, there is a heat transport among even and odd sites of the chain and the environment. As the temperature is increased, the transported charge and heat decrease and vanish at infinite temperature. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_15863 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Charge and heat pumping in the Rice-Mele chain at finite temperature Roura-Bas, P. Aligia, A. A. Mesoscale and Nanoscale Physics Other Condensed Matter It is well known that quantized topological charge pumping takes place in the half filled Rice-Mele chain performing a closed cycle in parameter space. We extend previous studies to the case of charge and heat transport at arbitrary filling and temperature using the corresponding continuity equation with focus in the non-interacting case. The amount of charge and heat transported for any adiabatic time dependence of the parameters is given by a double integral of an analytical function. We find that quantized transport is lost except in trivial cases. In particular, for popular pumping circuits used which lead to quantized non-trivial charge transport at zero temperature, the heat transported in the cycle vanishes. For other pumping circuits, there is a heat transport among even and odd sites of the chain and the environment. As the temperature is increased, the transported charge and heat decrease and vanish at infinite temperature. |
| title | Charge and heat pumping in the Rice-Mele chain at finite temperature |
| topic | Mesoscale and Nanoscale Physics Other Condensed Matter |
| url | https://arxiv.org/abs/2411.15863 |