Hole doping MgB$_2$ without chemical substitution

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Structures for realizing hole-doped MgB$_2$ without appealing to chemical substitutions are proposed. These structures which consist of alternating MgB$_2$ and graphene layers have small excess energy compared to bulk graphite and MgB$_2$. Density functional theory based first-principles electronic structure calculations show significant charge transfer from the MgB$_2$ layer to graphene, resulting in effectively hole-doped MgB$_2$. Substantial enhancement in the density of states at the Fermi level of the proposed structure is predicted.

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Superconductivity, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/124699

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0702625
 http://arxiv.org/abs/cond-mat/0702625

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arXiv