Experimental probing of the anisotropy of the empty p states near the Fermi level in MgB2

Details Experimental probing of the anisotropy of the empty p states near the Fermi level in MgB2 Experimental probing of the anisotropy of the empty p states near the Fermi level in MgB2

2003-01-29

arxiv.org/abs/cond-mat/0301575v1

Physics

Condensed Matter

Superconductivity

15 pages, 5 figures

Scientific paper

10.1063/1.1583132

We have studied the Boron K-edge in the superconductor MgB2 by electron energy loss spectroscopy (EELS) and experimentally resolved the empty p states at the Fermi level that have previously been observed within an energy window of 0.8eV by soft x-ray absorption spectroscopy. Using angular resolved EELS, we find that these states at the immediate edge onset have pxy character in agreement with predictions from first-principle electronic structure calculations.

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