Abstract
Two-dimensional band structures of single-crystalline 1T-TaS 2 have been directly observed by using a new version of two-dimensional display-type spherical mirror analyzer. The intensity distribution patterns for linearly-polarized synchrotron radiation normally incident on the cleaved surface have shown unusual angular distributions. The non three-fold symmetry is discussed by considering the angular dependence of the dipole transition probability for the s-polarized synchrotron radiation from each atomic orbital with particular symmetry, as well as the tight-binding initial state and a free electron like final state. In addition, circular dichroism in angular distribution (CDAD) of the photoemission pattern from the valence band is predicted for 1T-TaS 2.
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