Thermoelectric effect at the quantum Hall-superconductor interface
Fuente:
arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914087493959680 |
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| author | McCourt, Jordan T. Chiles, John Chen, Chun-Chia Watanabe, Kenji Tanaguchi, Takashi Amet, Francois Finkelstein, Gleb |
| author_facet | McCourt, Jordan T. Chiles, John Chen, Chun-Chia Watanabe, Kenji Tanaguchi, Takashi Amet, Francois Finkelstein, Gleb |
| contents | The interfaces of quantum Hall insulators with superconductors have emerged as a promising platform to realise interesting physics that may be relevant for topologically protected quantum computing. However, these interfaces can host other effects which obscure the detection of the desired excitations. Here we present measurements of the thermoelectric effect at the quantum Hall-superconductor interface. We explain the heat transport by considering the formation of a hotspot at the interface, which results in a non-equilibrium distribution of electrons that can propagate across the superconductor through vortex cores. The observed thermoelectric effect results in a voltage which changes sign on quantum Hall plateaus and responds to the rearrangement of vortices in the wire. These observations highlight the complex interplay of thermal and charge phenomena at the quantum Hall -- superconductor interfaces and should be considered when interpreting transport measurements in similar systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_09798 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Thermoelectric effect at the quantum Hall-superconductor interface McCourt, Jordan T. Chiles, John Chen, Chun-Chia Watanabe, Kenji Tanaguchi, Takashi Amet, Francois Finkelstein, Gleb Mesoscale and Nanoscale Physics Superconductivity The interfaces of quantum Hall insulators with superconductors have emerged as a promising platform to realise interesting physics that may be relevant for topologically protected quantum computing. However, these interfaces can host other effects which obscure the detection of the desired excitations. Here we present measurements of the thermoelectric effect at the quantum Hall-superconductor interface. We explain the heat transport by considering the formation of a hotspot at the interface, which results in a non-equilibrium distribution of electrons that can propagate across the superconductor through vortex cores. The observed thermoelectric effect results in a voltage which changes sign on quantum Hall plateaus and responds to the rearrangement of vortices in the wire. These observations highlight the complex interplay of thermal and charge phenomena at the quantum Hall -- superconductor interfaces and should be considered when interpreting transport measurements in similar systems. |
| title | Thermoelectric effect at the quantum Hall-superconductor interface |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2510.09798 |