Premium
An infrared study of the superconducting diamond
Author(s) -
Lupi S.,
Baldassarre L.,
Ortolani M.,
Calvani P.,
Schade U.,
Takano Y.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200776336
Subject(s) - superconductivity , synchrotron radiation , diamond , condensed matter physics , infrared , phonon , synchrotron , reflectivity , materials science , physics , optics , metallurgy
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 α 2 F ( ω ) and the optical superconducting gap 2 Δ . We conclude that superconducting diamond behaves as a “dirty” BCS superconductor. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)