Electronic structure of MgB$_2$: X-ray emission and absorption studies

Details Electronic structure of MgB$_2$: X-ray emission and absorption studies Electronic structure of MgB$_2$: X-ray emission and absorption studies

2001-03-23

arxiv.org/abs/cond-mat/0103487v3

Phys. Rev. B 65, 134509 (2002)

Physics

Condensed Matter

Superconductivity

final version as published in PRB

Scientific paper

10.1103/PhysRevB.65.134509

Measurements of x-ray emission and absorption spectra of the constituents of MgB$_2$ are presented. The results obtained are in good agreement with calculated x-ray spectra, with dipole matrix elements taken into account. The comparison of x-ray emission spectra of graphite, AlB$_2$, and MgB$_2$ in the binding energy scale supports the idea of charge transfer from $\sigma$ to $\pi$ bands, which creates holes at the top of the bonding $\sigma$ bands and drives the high-T$_c$

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