Thermal relaxation in titanium nanowires: signatures of inelastic electron-boundary scattering in heat transfer
| Autor: | Elo, Teemu, Lähteenmäki, Pasi, Golubev, Dmitri, Savin, Alexander, Arutyunov, Konstantin, Hakonen, Pertti |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s10909-017-1802-2 |
| Popis: | 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 $T_e$ by Joule heating at the base temperature of a dilution refrigerator, we probe the electron-phonon coupling and the thermal boundary resistance at temperatures $T_e= 0.5 - 3$ Kelvin. Using a regular $T^5$-dependent electron-phonon coupling of clean metals and a $T^4$-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. Comment: 18 pages, 5 figures |
| Databáze: | arXiv |
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