2006/02/06 by Michele Ortolani, M. Ortolani, S. Lupi +11 · 2 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Diamond #Diamond and Carbon-based Materials Research #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum electrodynamics #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.97.097002
published as Phys. Rev. Lett. 97, 097002 (2006) · 4 pages including 3 figures
arxiv created 2006/02/06 · openalex publication_date 2006/08/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 5 cm^\ensuremath-1, by also using coherent synchrotron radiation. We thus determine the optical gap 2\ensuremathΔ, the field penetration depth \ensuremathλ, the range of action of the Ferrell-Glover-Tinkham sum rule, and the electron-phonon spectral function \ensuremathα2F(\ensuremathω). We conclude that diamond behaves as a dirty BCS superconductor.