Physics – Condensed Matter – Superconductivity
Scientific paper
2009-10-09
Phys. Rev. B 80, 184503 (2009)
Physics
Condensed Matter
Superconductivity
5 pages, 5 figures, submitted to PRB
Scientific paper
10.1103/PhysRevB.80.184503
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.
Kitaoka Yoshio
Miyazaki Hisao
Mukuda Hidekazu
Onuki Yoshichika
Settai Rikio
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