Affiliation: | (1) Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan;(2) The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-01, Japan;(3) The Nomura Securities Co., Ltd, 1-9-1, Nihonbaashi, Chuo-ku, Tokyo, 103-8011, Japan |