ARPES Study of X-Point Band Overlaps in LaB$_6$ and SmB$_6$ - Contrast to SrB$_6$ and EuB$_6$

Details ARPES Study of X-Point Band Overlaps in LaB$_6$ and SmB$_6$ - Contrast to SrB$_6$ and EuB$_6$ ARPES Study of X-Point Band Overlaps in LaB$_6$ and SmB$_6$ - Contrast to SrB$_6$ and EuB$_6$

2001-07-10

arxiv.org/abs/cond-mat/0107203v1

Physica B-Condensed Matter 312: 668-669 Mar 2002

Physics

Condensed Matter

Strongly Correlated Electrons

submitted to SCES '01

Scientific paper

10.1016/S0921-4526(01)01291-1

In contrast to our recent finding of an X-point band gap in divalent
hexaborides, we report here that angle resolved photoemission spectroscopy
(ARPES) data shows that the gap is absent for trivalent LaB$_6$ and is absent
or nearly so for mixed valent SmB$_6$. This finding demonstrates a nontrivial
evolution of the band structure from divalent to trivalent hexaborides.

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