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Determination of the electron-phonon coupling constant in tungsten

Daraszewicz, SL; Giret, Y; Tanimura, H; Duffy, DM; Shluger, AL; Tanimura, K; (2014) Determination of the electron-phonon coupling constant in tungsten. Applied Physics Letters , 105 (2) , Article 023112. 10.1063/1.4890413. Green open access

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Abstract

We used two methods to determine the effective electron-phonon coupling constant (G 0) in tungsten. Our first principles calculations predict G 0 = 1.65 × 1017 W m−3 K−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 0 = 1.4(3) × 1017 W m−3 K−1, in good agreement with the theoretical prediction. The described effective method of calculating and measuring G0 in bulk materials can be easily extended to other metals.

Type: Article
Title: Determination of the electron-phonon coupling constant in tungsten
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.4890413
Publisher version: http://dx.doi.org/10.1063/1.4890413
Language: English
Additional information: Reprinted with permission from Daraszewicz, SL; Giret, Y; Tanimura, H; Duffy, DM; Shluger, AL; Tanimura, K; (2014) Determination of the electron-phonon coupling constant in tungsten. Applied Physics Letters, 105 (2), Article 023112, 10.1063/1.4890413. Copyright 2014, American Institute of Physics.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/1451162
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