Yoshiyuki Amemiya
			
			
			Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo,
			Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, JAPAN
			E-mail: amemiya@k.u-tokyo.ac.jp
			Tel/Fax: +81-4-7136-3750
		
		Division of Advanced Spectroscopy,
			
		Institute for Solid State Physics,
			The University of Tokyo,
			Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, JAPAN
			E-mail: ttaka@issp.u-tokyo.ac.jp
			Tel/Fax: +81-4-7136-3370