Two-dimensional mapping on angle-resolved photoemission spectroscopy (ARPES) provides a rich variety of information concerning the electronic and atomic structure of solids and surfaces. We have demonstrated a two- dimensional circular dichroism (CD) ARPES mapping of Rashba-split surface state on Bi(111) film grown on Si(111) substrate. Circular polarization at the photon energy region between 8 and 9 eV has been achieved using a MgF2 λ/4 wave plate at the PGM station of BL13 at Saga Light Source. Strong CD in ARPES mapping of surface states on Bi(111) has been observed for whole surface Brillouin zone and seems entangled with spin and local angular momentum, as well as experimental geometry and the two-dimensional character of surface state.
Circular dichroism in angle-resolved photoemission mapping of surface state on Bi(111)
Kazutoshi Takahashi, Masaki Imamura, Isamu Yamamoto, Junpei Azuma; Circular dichroism in angle-resolved photoemission mapping of surface state on Bi(111). AIP Conf. Proc. 15 January 2019; 2054 (1): 040011. https://doi.org/10.1063/1.5084612
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