Local moments in the heterogeneous electronic state of Cd or Zn-substituted CeCoIn; Around Kondo holes

Sakai, Hironori   ; Hattori, Taisuke; Tokunaga, Yo  ; Kambe, Shinsaku  ; Yokoyama, Makoto*; Zhu, J.-X.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

We have used nuclear quadrupole resonance (NQR) to probe microscopically the response of a prototypical quantum critical metal CeCoIn to substitutions of small amounts of Cd or Zn for In. Such non-magnetic Cd or Zn substitutions induce a long range antiferromagnetism. In the case of the Cd substitutions, approximately half of the Cd substituents induce local Ce moments in their close proximity, as observed by site-dependent longitudinal nuclear spin relaxation rates . In the case of Zn substitutions, the similar site dependence of is observed as well. We will discuss about the heterogeneous electronic state realized in such a dilutely substituted system.