Experimental Electronic Structure and Interband Nesting in BaVS3
Abstract
The correlated 3d sulphide BaVS3 is a most interesting compound because of the apparent coexistence of one-dimensional and three-dimensional properties. Our experiments explain this puzzle and shed new light on its electronic structure. High-resolution angle-resolved photoemission measurements in a 4eV wide range below the Fermi level explored the coexistence of weakly correlated a1g wide-band and strongly correlated eg narrow-band d-electrons that is responsible for the complicated behavior of this material. The most relevant result is the evidence for a1g--eg inter-band nesting condition.
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