High efficiency and high energy-resolution spin-polarized photoemission spectrometer

T. Okuda; Y. Takeichi; A. Harasawa; I. Matsuda; T. Kinoshita; A. Kakizaki

doi:10.1140/epjst/e2009-00990-y

EPJ

High efficiency and high energy-resolution spin-polarized photoemission spectrometer

T. Okuda¹, Y. Takeichi¹, A. Harasawa¹, I. Matsuda¹, T. Kinoshita² and A. Kakizaki¹

¹ Synchrotron Radiation Laboratory, Institute for Solid State Physics (ISSP), the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 270-8581, Japan
² JASRI.SPring-8, 1-1-1 Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan

Abstract

We have developed a new spin-polarized photoemission spectrometer combined a commercial hemispherical electron energy analyzer with an electron spin-polarimeter employing the very low energy electron diffraction (VLEED) at a Fe(001)p(1×1)-O surface. The new polarimeter has realized the effective Sherman function of 0.40 and the figure of merit of 1.9×10^-2, which is approximately two orders of magnitude higher than that expected with a compact Mott scattering spin-polarimeter. The new system enabled us to measure spin- and angle-resolved photoemission spectra with high energy and momentum resolutions.