Heavily boron-doped, diamond films can become superconducting with critical temperatures T-c well above 4 K. Here we first measure the reflectivity of such a film down to 5 cm(-1), by also using coherent synchrotron radiation. We thus determine the optical gap 2 Delta, the field penetration depth lambda, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function alpha F-2(omega). We conclude that diamond behaves as a dirty BCS superconductor.
Low-energy electrodynamics of superconducting diamond
Lupi S;
2006
Abstract
Heavily boron-doped, diamond films can become superconducting with critical temperatures T-c well above 4 K. Here we first measure the reflectivity of such a film down to 5 cm(-1), by also using coherent synchrotron radiation. We thus determine the optical gap 2 Delta, the field penetration depth lambda, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function alpha F-2(omega). We conclude that diamond behaves as a dirty BCS superconductor.File in questo prodotto:
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