Affiliation: | (1) Dept. of Physics, Faculty of Science, Univ. of Tokyo, Tokyo, Japan;(2) TRIUMF and Dept. of Chemistry and Physics, Univ. of British Columbia, Vancouver, Canada;(3) Dept. of Metallurgy, Univ. of British Columbia, Vancouver, Canada;(4) Institute for Solid State Physics, Univ. of Tokyo, Tokyo, Japan |