Low-energy electrodynamics of superconducting diamond

Details Low-energy electrodynamics of superconducting diamond Low-energy electrodynamics of superconducting diamond

2006-02-06

arxiv.org/abs/cond-mat/0602150v1

Phys. Rev. Lett. 97, 097002 (2006)

Physics

Condensed Matter

Superconductivity

4 pages including 3 figures

Scientific paper

10.1103/PhysRevLett.97.097002

Heavily-boron-doped diamond films 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, the field penetration depth, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function. We conclude that diamond behaves as a dirty BCS superconductor.

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