ARPES study of X-point band overlaps in LaB6 and SmB6 - Contrast to SrB6 and EuB6
Published Web Locationhttps://doi.org/10.1016/S0921-4526(01)01291-1
Angle resolved photoemission spectroscopy (ARPES) was used to study the complete absence of an X-point band gap for trivalent LaB6 and a partial absence of the band gap for mixed valent SmB6. A X-point band gap was found in divalent hexaborides. The two findings imply a nontrivial evolution of the band structure from divalent to trivalent hexaborides.