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Role of the dopant in the superconductivity of diamond

Blase, Xavier and Adessi, Christophe and Connétable, Damien Role of the dopant in the superconductivity of diamond. (2004) Physical review letters , vol. 93 (n° 23). pp. 237004-1. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.93.237004

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 lambda originates in strongly localized defect-related vibrational modes, yielding a very peaked Eliashberg alpha(2)F(omega) function. The electron-phonon coupling potential is found to be extremely large, and T-C is limited by the low value of the density of states at the Fermi level. The effect of boron isotope substitution is explored.

Item Type:Article
Additional Information:Thanks to the American Physical Society editor. This publication is available at http://prl.aps.org/abstract/PRL/v93/i23/e237004
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
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Deposited By: Damien CONNETABLE

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