Role of the Dopant in the Superconductivity of Diamond
X. Blase, Ch. Adessi, D. Connétable
DOI 10.1103/PhysRevLett.93.237004 · Physical Review Letters
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BC53 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | unknown |
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