Determination of the electron-phonon coupling constant in tungsten

Szymon L. Daraszewicz, Yvelin Giret, Hiroshi Tanimura, Dorothy M. Duffy, Alexander L. Shluger, Katsumi Tanimura

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18 Citations (Scopus)

Abstract

We used two methods to determine the effective electron-phonon coupling constant (G0) in tungsten. Our first principles calculations predict G0 = 1.65 × 1017W 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 G0 = 1.4(3) × 1017W 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.

Original languageEnglish
Article number023112
JournalApplied Physics Letters
Volume105
Issue number2
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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