TY - JOUR
T1 - Low-energy electrodynamics of superconducting diamond
AU - Ortolani, M.
AU - Lupi, S.
AU - Baldassarre, L.
AU - Schade, U.
AU - Calvani, P.
AU - Takano, Y.
AU - Nagao, M.
AU - Takenouchi, T.
AU - Kawarada, H.
PY - 2006
Y1 - 2006
N2 - Heavily boron-doped, diamond films can become superconducting with critical temperatures Tc well above 4 K. Here we first measure the reflectivity of such a film down to 5cm-1, by also using coherent synchrotron radiation. We thus determine the optical gap 2Δ, the field penetration depth λ, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function α2F(ω). We conclude that diamond behaves as a dirty BCS superconductor.
AB - Heavily boron-doped, diamond films can become superconducting with critical temperatures Tc well above 4 K. Here we first measure the reflectivity of such a film down to 5cm-1, by also using coherent synchrotron radiation. We thus determine the optical gap 2Δ, the field penetration depth λ, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function α2F(ω). We conclude that diamond behaves as a dirty BCS superconductor.
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U2 - 10.1103/PhysRevLett.97.097002
DO - 10.1103/PhysRevLett.97.097002
M3 - Article
AN - SCOPUS:33748312253
SN - 0031-9007
VL - 97
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
M1 - 097002
ER -