Experimental probing of the anisotropy of the empty p states near the Fermi level in MgB[sub 2]

Klie, R. F.; Zhu, Y.; Schneider, G.; Tafto, J.
June 2003
Applied Physics Letters;6/16/2003, Vol. 82 Issue 24, p4316
Academic Journal
We have studied the boron K edge in the superconductor MgB[SUB2] 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 0.8 eV by soft x-ray absorption spectroscopy. Using angular-resolved EELS, we find that these states at the immediate edge onset have p[SUBxy] character in agreement with predictions from first-principle electronic structure calculations.


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