Strong coupling between antiferromagnetic and superconducting order parameters of CeRhIn5 studied by I115n nuclear quadrupole resonance spectroscopy

M. Yashima; H. Mukuda; Y. Kitaoka; H. Shishido; R. Settai; Y. Ōnuki

doi:10.1103/PhysRevB.79.214528

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Strong coupling between antiferromagnetic and superconducting order parameters of CeRhIn5 studied by I115n nuclear quadrupole resonance spectroscopy

M. Yashima, H. Mukuda, Y. Kitaoka, H. Shishido, R. Settai, Y. Ōnuki

DOI 10.1103/PhysRevB.79.214528 · Physical Review B

T1

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Abstract

We report on a pressure (P)-induced evolution of magnetism and superconductivity (SC) in a helical magnet CeRhIn5 with an incommensurate wave vector Qi=(12,12,0.297) through the I115n nuclear quadrupole resonance (NQR) measurements under P. Systematic measurements of the I115n-NQR spectrum reveal that the commensurate antiferromagnetism (AFM) with Qc=(12,12,12) is realized above Pm∼1.7 GPa. An important finding is that the size of SC gap and Tc increase as the magnitude of the AFM moment decreases in the P region, where SC uniformly coexists with the commensurate AFM. This result provides evidence of strong coupling between the commensurate AFM order parameter (OP) and SC OP.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeRhIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown