Determination of the electron–phonon coupling constant in tungsten
- Department of Physics and Astronomy, London Centre for Nanotechnology, University College London, Gower Street, WC1E 6BT London (United Kingdom)
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047 (Japan)
We used two methods to determine the effective electron-phonon coupling constant (G{sub 0}) in tungsten. Our first principles calculations predict G{sub 0} = 1.65 × 10{sup 17 }W m{sup −3} K{sup −1}. The temporal decay of the femtosecond-resolution optical reflectivity for a (100) surface of bulk W was measured using a pump-probe scheme and analysed using ab initio parameterised two temperature model, which includes both the effects of the electron-phonon coupling and thermal conduction into bulk. This analysis gives G{sub 0} = 1.4(3) × 10{sup 17 }W m{sup −3} K{sup −1}, in good agreement with the theoretical prediction. The described effective method of calculating and measuring G{sub 0} in bulk materials can be easily extended to other metals.
- OSTI ID:
- 22311101
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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