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.
An infrared study of the superconducting diamond / Lupi, Stefano; Baldassarre, Leonetta; Ortolani, Michele; Calvani, Paolo; U., Schade; Y., Takano. - In: PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE. - ISSN 1862-6300. - STAMPA. - 204:9(2007), pp. 2945-2949. (Intervento presentato al convegno 12th Hasselt Diamond Workshop 2007 (SBDD XII) tenutosi a Diepenbeek-Hasselt, BELGIUM nel FEB 28-MAR 02, 2007) [10.1002/pssa.200776336].
An infrared study of the superconducting diamond
LUPI, Stefano;BALDASSARRE, Leonetta;ORTOLANI, MICHELE;CALVANI, Paolo;
2007
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
