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arXiv · 0910.1679

Novel phase diagram for antiferromagnetism and superconductivity in pressure-induced heavy-fermion superconductor Ce$_2$RhIn$_8$ probed by In-NQR

M. Yashima·S. Taniguchi·H. Miyazaki·H. Mukuda·Y. Kitaoka·H. Shishido·R. Settai·Y. Onuki
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Abstract

We present a novel phase diagram for the antiferromagnetism and superconductivity in Ce$_2$RhIn$_8$ probed by In-NQR studies under pressure ($P$). The quasi-2D character of antiferromagnetic spin fluctuations in the paramagnetic state at $P$ = 0 evolves into a 3D character because of the suppression of antiferromagnetic order for $P > P_{\rm QCP}\sim$ 1.36 GPa (QCP: antiferromagnetic quantum critical point). Nuclear-spin-lattice-relaxation rate $1/T_1$ measurements revealed that the superconducting order occurs in the $P$ range 1.36 -- 1.84 GPa, with maximum $T_c\sim$ 0.9 K around $P_{\rm QCP}\sim$ 1.36 GPa.

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M. Yashima, S. Taniguchi, H. Miyazaki, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Onuki. 2009-10-09. Novel phase diagram for antiferromagnetism and superconductivity in pressure-induced heavy-fermion superconductor Ce$_2$RhIn$_8$ probed by In-NQR. https://doi.org/10.1103/physrevb.80.184503

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