This work was done in collaboration with A. Asamitsu;
Y;
Tomioka;
H;
Kuwahara;
Moritomo;
Yoshizawa;
Kawano;
T;
Arima;
Katsufuji;
Taguchi;
S;
Yamaguchi;
Takagi;
K;
Kumagai;
and Y. lye. The author is also grateful to M. Imada;
A. Fujimori and N. Nagaosa for enlightening discussion. The work was in part supported by NEDO and also by Grant-In-Aids from the Ministry of Education;
Japan;