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$$^{115}$$In-NQR study of antiferromagnetism and superconductivity in CeRhIn$$_5$$ and CeIn$$_3$$ under pressure

kawasaki, Shinji*; Yashima, Mitsuharu*; kotegawa, Yu*; Mito, Takeshi*; Kawasaki, Yu*; Zheng, G.-Q.*; Kitaoka, Yoshio*; Shishido, Hiroaki*; Araki, Shingo*; Aoki, Dai*; Haga, Yoshinori ; Settai, Rikio*; Onuki, Yoshichika

We report the novel phase diagram of superconductivity (SC) and antiferromagnetism (AFM) in heavy-fermion (HF) pressure ($$P$$)-induced superconductors CeRhIn$$_5$$ and CeIn$$_3$$ through nuclear-quadrupole-resonance (NQR) measurements under $$P$$. The $$P$$-induced superconductivity in CeRhIn$$_5$$ coexists with AFM on a microscopic level in 1.5-1.9 GPa. By contrast, in CeIn$$_3$$, the $$P$$-induced phase separation of AFM and paramagnetism (PM) takes place without any trace of a quantum phase transition. The outstanding finding is that SC sets in at both the phasesmagnetically separated into AFM and PM in 2.28-2.5 GPa.

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Category:Chemistry, Multidisciplinary

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