Abstract
We have newly developed an inverse photoemission (IPE) spectrometer with high efficiency and measured k-resolved IPE spectra of LaB6(001) to study the unoccupied surface states. The surface states were found to be located at 0.2 eV above the Fermi level at the Γ point and showed energy dispersion along the Γ–M direction of the surface Brillouin zone (BZ). The dispersion of the unoccupied surface states is inconsistent with the recently reported theoretical calculation. The discrepancy is considered that the calculation adopted smaller interlayer spacing between topmost La layer and B subsurface as it is in the system. [DOI: 10.1380/ejssnt.2005.367]
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