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 2?, the field penetration depth ?, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function ?2F(?). We conclude that diamond behaves as a dirty BCS superconductor. © 2006 The American Physical Society.
Low-energy electrodynamics of superconducting diamond
Ortolani M;Lupi S;Calvani P;
2006
Abstract
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 2?, the field penetration depth ?, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function ?2F(?). We conclude that diamond behaves as a dirty BCS superconductor. © 2006 The American Physical Society.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
