Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan, Kashiwa, 277-8581 Japan ; Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany, Bayreuth, D-95440 Germany
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan, Kashiwa, 277-8581 Japan
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan, Kashiwa, 277-8581 Japan
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan, Kashiwa, 277-8581 Japan
Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany, Bayreuth, D-95440 Germany
Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany, Bayreuth, D-95440 Germany