The phase diagram of antiferromagnetism and superconductivity in CeRhIn5: a study of 115In NQR under pressure
JOURNAL OF PHYSICS-CONDENSED MATTER(2005)
Abstract
We report on the pressure (P) versus temperature (T) phase diagram of the P-induced heavy fermion (HF) superconductor CeRhIn5 via nuclear quadrupole resonance (NQR) measurements under P. At P = 2.1 GPa, the T dependence of the nuclear spin-lattice relaxation rate 1/T-1 revealed antiferromagnetic critical fluctuations due to the closeness of antiferromagnetism. As P decreases slightly down to 1.9 GPa, a pseudogap emerges above T-c similar to 2 K, suggesting the appearance of superconducting fluctuations associated with a strong coupling effect among quasiparticles.
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Key words
cerhin5,antiferromagnetism,superconductivity,phase diagram,nqr
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