Hiroshima Synchrotron Radiation Center, Hiroshima University,Japan

报告人简介：
Prof. Kenya Shimada received his PhD in physics from University of Tokyo, Japan in 1996, and then he joined Hiroshima Synchrotron Radiation Center(HiSOR) and became an Assistant professor of Hiroshima University in Japan. From 2002, he became a Associate professor in the same institute. Starting from 2010, he was promoted as a full professor in HiSOR. Currently he worked as a vice director of HiSOR.

His research interests are mainly development of synchrotron-based high-resolution photoemission spectroscopy measurement system and study of correlated electron systems and manybody interactions in metals by means of high-resolution ARPES at HiSOR. He has published 222 papers.

报告摘要:
High-resolution angle-resolved photoemission spectroscopy (ARPES) is one of the most powerful tools to reveal directly the electronic structures of solids. With improved energy and momentum resolution, one can evaluate detailed band structures and magnitudes of many-body interactions on the quasi-particles near the Fermi level. Tunable photon energy and variable light polarization are now indispensable for the state-of-the-art high-resolution ARPES experiments of novel materials and multiband correlated electron systems [1-5]. Furthermore, development of highly efficient spin detector enables us to examine fine spin textures of the surface derived states or edge states of topological systems [6-8].

We run high-resolution ARPES experiments using undulator radiation in the VUV-SX region (hν：5-300 eV) from a 700-MeV compact electron-storage ring "HiSOR", in the campus of Hiroshima University. In this talk, I will introduce polarization-dependent high-resolution ARPES system on the linear undulator beamline, and low-energy high-resolution ARPES system / high-resolution spin-polarized ARPES system on the variably polarizing undulator (quasi-periodic APPLE-II [9]) beamline. I will show some results from these beamlines.

[1] K. Kuroda et al., Phys. Rev. Lett. 105, 146801 (2010).
[2] H. Iwasawa et al., Phys. Rev. Lett. 105, 226406 (2010): Phys. Rev. Lett. 109, 066404 (2012).
[3] Y. Zhang et al., Phys. Rev. B 83, 054510 (2011).
[4] Hemian Yi, et al., Scientific Report 4, 6106 (6p) (2014).
[5] K. Miyamoto et al., Phys. Rev. Lett. 108, 066808 (2012).
[6] T. Okuda et al., Rev. Sci. Instrum. 82, 103302 (2011).
[7] K. Miyamoto et al., Phys. Rev. Lett. 109, 166802 (2012).
[8] T. Okuda et al., Phys. Rev. Lett. 111, 206803 (2013).
[9] S. Sasaki et al., J. Phys.: Conf. Ser. 425, 032009 (2013).

联  系  人：刘国东（82649720）