Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 204, Issue 9, Pages 2945-2949Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.200776336
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When heavily doped with boron, diamond films can become superconducting with critical temperatures T-c well above 4 K. Here, we measure the reflectivity of such a film down to 5 cm(-1), by using both conventional radiation sources and Coherent Synchrotron Radiation. We thus determine the electron-phonon Eliashberg spectral function alpha F-2(omega) and the optical superconducting gap 2 Delta. We conclude that superconducting diamond behaves as a dirty BCS superconductor. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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