Microscopic aspect of electronic inhomogeneity introduced by substitutions of Sn and Cd in quantum critical material CeCoIn

Sakai, Hironori   ; Ronning, F.*; Zhu, J.-X.*; Wakeham, N.*; Yasuoka, Hiroshi; Tokunaga, Yo  ; Kambe, Shinsaku  ; Bauer, E. D.*; Thompson, J. D.*

We have performed In-NQR experiments on Sn and Cd-substituted CeCoIn. The NQR spectra for In(1) sites shows characteristic satellite lines and those for In(2) sites become broadened by the substitutions. The electrical field gradients in the substituted CeCoIn are calculated using the density fractional theory. By comparison, the assignments of the satellite NQR lines are attempted. The relaxation rates are also measured. In this talk, we will show the recent data and discuss the electronic states in the substituted CeCoIn.