Low-energy electrodynamics of superconducting diamond

Abstract

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.

4 pages including 3 figures

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• Observation of charge-density-wave excitations in manganites
• Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
• Non-adiabatic Kohn Anomaly in Heavily Boron-doped Diamond
• Magnetization Measurement of a Possible High-Temperature Superconducting State in Amorphous Carbon Doped with Sulfur
• Observation of superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy
• Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions
• Sub-THz electrodynamics of the graphene-like superconductor CaAlSi
• Observation of conduction electron spin resonance in boron doped diamond
• Superconducting boron doped nanocrystalline diamond microwave coplanar resonator
• How to modify the van der Waals and Casimir forces without change of dielectric permittivity
• A cryogenic magneto-optical device for long wavelength radiation
• Large Microwave Inductance of Granular Boron-Doped Diamond Superconducting Films
• Tunable electronic structure and stoichiometry dependent disorder in Nanostructured VO${}_x$ films
• Terahertz spectroscopy evidence of possible 40 K superconductivity in rhenium-doped strontium ruthenates