Projects per year
Abstract
We have employed noise thermometry for investigations of thermal relaxation between the electrons and the substrate in nanowires patterned from 40-nm-thick titanium film on top of silicon wafers covered by a native oxide. By controlling the electronic temperature (Formula presented.) by Joule heating at the base temperature of a dilution refrigerator, we probe the electron–phonon coupling and the thermal boundary resistance at temperatures (Formula presented.)–3 K. Using a regular (Formula presented.)-dependent electron–phonon coupling of clean metals and a (Formula presented.)-dependent interfacial heat flow, we deduce a small contribution for the direct energy transfer from the titanium electrons to the substrate phonons due to inelastic electron-boundary scattering.
Original language | English |
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Pages (from-to) | 204–216 |
Number of pages | 13 |
Journal | Journal of Low Temperature Physics |
Volume | 189 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 16 Aug 2017 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Electron-phonon coupling
- Electronic Kapitza conductance
- Kapitza resistance
- Shot noise thermometry
- Thermal contact
- Thermal relaxation
- Titanium
Fingerprint
Dive into the research topics of 'Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer'. Together they form a unique fingerprint.Projects
- 2 Finished
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QuDeT: Quantum devices in topological matter: carbon nanotubes, graphene, and novel superfluids
Thanniyil Sebastian, A., Todoshchenko, I., Hakonen, P., Zavyalov, V., Häkkinen, P., Ervasti, M., Kirsanov, N., Sergeicheva, E., Kaikkonen, J., Kamada, M., Manninen, J., Perelshtein, M., Tan, Z., Will, M., Song, X., Tong, F., Haque, M., Pandey, P., Lilja, I. & Kumar, M.
05/11/2015 → 31/12/2021
Project: EU: ERC grants
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Centre of Excellence in Low Temperature Quantum Phenomena and Devices
Hakonen, P., Kumar, M., Thanniyil Sebastian, A., Cox, D., Song, X., Kaikkonen, J., Lähteenmäki, P. & Elo, T.
01/01/2015 → 31/12/2017
Project: Academy of Finland: Other research funding
Equipment
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OtaNano – Low Temperature Laboratory
Alexander Savin (Manager) & Anna Rissanen (Other)
OtaNanoFacility/equipment: Facility