Numerical Renormalization Group Study of Quadrupole Kondo Effect with the Crystal-field Excited State

Yuki Kaneko, Hirokazu Tsunetsugu

We have studied the quadrupolar Kondo effect for an impurity in cubic environment with taking account of a singlet excited state ${\Gamma }_1$, which models a ${\mathrm{Pr}}^{3+}$ ion with a…