Electron energy-loss spectroscopy characterization of the boron p-like density of states in MgB[sub 2]

Kong, X.; Wang, Y. Q.; Li, H.; Duan, X. F.; Yu, R. C.; Li, S. C.; Li, F. Y.; Jin, C. Q.
February 2002
Applied Physics Letters;2/4/2002, Vol. 80 Issue 5, p778
Academic Journal
The microstructure and boron K-edge fine structure in MgB[sub 2] produced under high pressure are studied using high-resolution transmission electron microscopy and electron energy-loss spectroscopy in a transmission electron microscope. A pre-peak located at 188 eV in the boron K-edge energy-loss near edge structure (ELNES) provides a direct evidence for the existence of a high and unfilled p-like density of states (DOS) across the Fermi level. The σ(p[sub x]+p[sub y]) states dominate in this unfilled p-like DOS. The theoretical simulation results of the ELNES using the linearized augmented plane wave method can explain the experimental spectrum very well. © 2002 American Institute of Physics.


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