Role of the Dopant in the Superconductivity of Diamond

X. Blase, Ch. Adessi, and D. Connétable
Phys. Rev. Lett. 93, 237004 – Published 30 November 2004

Abstract

We present an ab initio study of the recently discovered superconductivity of boron doped diamond within the framework of a phonon-mediated pairing mechanism. The role of the dopant, in substitutional position, is unconventional in that half of the coupling parameter λ originates in strongly localized defect-related vibrational modes, yielding a very peaked Eliashberg α2F(ω) function. The electron-phonon coupling potential is found to be extremely large, and TC is limited by the low value of the density of states at the Fermi level. The effect of boron isotope substitution is explored.

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  • Received 7 May 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.237004

©2004 American Physical Society

Authors & Affiliations

X. Blase*, Ch. Adessi, and D. Connétable

  • Laboratoire de Physique de la Matière Condensée et des Nanostructures (LPMCN), CNRS and Université Claude Bernard Lyon I, UMR 5586, Bâtiment Brillouin, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France

  • *Corresponding author. Electronic address: xblase@lpmcn.univ-lyon1.fr

See Also

Three-Dimensional MgB2-Type Superconductivity in Hole-Doped Diamond

Lilia Boeri, Jens Kortus, and O. K. Andersen
Phys. Rev. Lett. 93, 237002 (2004)

Superconductivity in Boron-Doped Diamond

K.-W. Lee and W. E. Pickett
Phys. Rev. Lett. 93, 237003 (2004)

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Vol. 93, Iss. 23 — 3 December 2004

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