Author/Authors :
Yuta Nabae، نويسنده , , Shogo Moriya، نويسنده , , Katsuyuki Matsubayashi، نويسنده , , Stephen M. Lyth، نويسنده , , Michal Malon، نويسنده , , Libin Wu، نويسنده , , Nazrul M. Islam، نويسنده , , Yuka Koshigoe، نويسنده , , Shigeki Kuroki، نويسنده , , Masa-aki Kakimoto، نويسنده , , Seizo Miyata، نويسنده , , Jun-ichi Ozaki، نويسنده ,
Abstract :
This article has been retracted: please see Elsevier Policy on Article Withdrawal ().
This article has been retracted at the request of the Authors.
This paper is retracted at the request of the authors because it has been discovered that L. Wu included false data in Fig. 7 in this paper. It is noted that a fact-finding commission of Tokyo Institute of Technology has found that the material preparation and characterisation were performed correctly.
