Femtosecond room-temperature measurement of the electron-phonon coupling constant γ in metallic superconductors

S. D. Brorson, A. Kazeroonian, J. S. Moodera, D. W. Face, T. K. Cheng, E. P. Ippen, M. S. Dresselhaus, and G. Dresselhaus
Phys. Rev. Lett. 64, 2172 – Published 30 April 1990
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Abstract

We report the first systematic femtosecond pump-probe measurements of the electron-phonon coupling constant λ in thin films of Cu, Au, Cr, Ti, W, Nb, V, Pb, NbN, and V3Ga. The agreement between our measured λ values and those obtained by other techniques is excellent, thus confirming recent theoretical predictions of Allen. By depositing thin Cu overlayers when necessary, we can extend this technique to nearly any metallic thin film.

  • Received 21 December 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.2172

©1990 American Physical Society

Authors & Affiliations

S. D. Brorson, A. Kazeroonian, J. S. Moodera, D. W. Face, T. K. Cheng, E. P. Ippen, M. S. Dresselhaus, and G. Dresselhaus

  • Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • Center for Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
  • Francis Bitter National Magnet Laboratory, Cambridge, Massachusetts 02139

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Vol. 64, Iss. 18 — 30 April 1990

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