Resonating Valence Bond Mechanism of Impurity Band Superconductivity in Diamond

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dc.creatorBaskaran, G.
dc.date2004-04-13
dc.date2004-05-25
dc.date.accessioned2026-07-07T02:57:35Z
dc.date.available2026-07-07T02:57:35Z
dc.descriptionSuperconductivity in an uncompensated boron doped diamond, a very recent observation, is strikingly close to an earlier observation of Anderson-Mott insulator to metal transition, prompting us to suggest an electron correlation driven superconductivity in an impurity band. Random coulomb potential remove a three fold orbital degeneracy of boron acceptor states, resulting in an effective single, narrow, tight binding and half filled band of holes. Singlet coupling between spins of neighboring neutral acceptors $B^0-B^0$ is the seed of pairing. Across the insulator to metal transition, a small and equal fraction of charged $B^+$ and $B^-$ states (free carriers) get spontaneously generated and delocalize. Thereupon neutral singlets resonate and get charged resulting in a resonating valence bond (RVB) superconducting state.
dc.description4 pages, 2 figures, few typos corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0404286
dc.identifierhttp://arxiv.org/abs/cond-mat/0404286
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23722
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleResonating Valence Bond Mechanism of Impurity Band Superconductivity in Diamond
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