We have performed angle-resolved photoemission spectroscopy on a layered Mott system BaCo1-x NixS2 across the phase transition from the antiferromagnetic insulator (x = 0.18) to anomalous metal (x = 0.28). In the anomalous metallic phase, we found a large Fermi surface centered at the M(A) point with a dominant Co (Ni) 3d3z2-r2 character. Hubbard bands in the insulating phase have a remnant of Fermi surface in the metallic phase and gradually evolve into metallic dispersive bands upon carrier doping. We conclude that the electronic structure of BaCo1-xNixS2 is basically different from that of the high-Tc cuprates although the transport and magnetic properties share some common features between the two layered compounds.
|頁（從 - 到）||1127-1132|
|期刊||Surface Review and Letters|
|出版狀態||Published - 2002 4月|
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