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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.29358 |
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| _version_ | 1866912990658297856 |
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| author | Haldar, Subhomoy Subero, Diego Kumar, Mukesh Karimi, Bayan Burke, Adam Samuelson, Lars Pekola, Jukka Maisi, Ville F. |
| author_facet | Haldar, Subhomoy Subero, Diego Kumar, Mukesh Karimi, Bayan Burke, Adam Samuelson, Lars Pekola, Jukka Maisi, Ville F. |
| contents | We investigate heat conduction and energy relaxation in an InAs semiconductor nanowire using a hybrid semiconductor-superconductor architecture. Local electronic temperatures are measured with an in-situ grown quantum dot thermometer, while controlled Joule heating is applied at different locations along the wire to probe temperature gradients at sub-kelvin temperatures. With a onedimensional heat transport model, we calculate an electron-phonon heat flow that scales as Q_{e-ph} \propto T^2.6, which is in close agreement with the T^3 dependence predicted for a clean one-dimensional electron gas coupled to a phonon bath. We further estimate a characteristic length l_{eq} = 370 nm, beyond this length scale, phonon-mediated heat transport dominates over heat conduction in our nanowire. Our results provide a quantitative measure of energy relaxation mechanisms in a onedimensional semiconductor and provide a framework for studying heat flow in low-dimensional nanostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_29358 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Heat Conduction and Energy Relaxation in an InAs Nanowire Approaching the Clean One-Dimensional Limit Haldar, Subhomoy Subero, Diego Kumar, Mukesh Karimi, Bayan Burke, Adam Samuelson, Lars Pekola, Jukka Maisi, Ville F. Mesoscale and Nanoscale Physics We investigate heat conduction and energy relaxation in an InAs semiconductor nanowire using a hybrid semiconductor-superconductor architecture. Local electronic temperatures are measured with an in-situ grown quantum dot thermometer, while controlled Joule heating is applied at different locations along the wire to probe temperature gradients at sub-kelvin temperatures. With a onedimensional heat transport model, we calculate an electron-phonon heat flow that scales as Q_{e-ph} \propto T^2.6, which is in close agreement with the T^3 dependence predicted for a clean one-dimensional electron gas coupled to a phonon bath. We further estimate a characteristic length l_{eq} = 370 nm, beyond this length scale, phonon-mediated heat transport dominates over heat conduction in our nanowire. Our results provide a quantitative measure of energy relaxation mechanisms in a onedimensional semiconductor and provide a framework for studying heat flow in low-dimensional nanostructures. |
| title | Heat Conduction and Energy Relaxation in an InAs Nanowire Approaching the Clean One-Dimensional Limit |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.29358 |