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Free keywords:
Heavy-fermion, Local inversion symmetry breaking, NMR, Superconductor
Abstract:
We performed 75As-NMR measurements in H k ab to investigate the normal-state magnetic properties of CeRh2As2, a recently-discovered heavy-fermion superconductor. We compared the NMR Knight shift K with the magnetic susceptibility χab, and estimated the hyperfine coupling constant Ahf from the slope of the K − χ plot. We observed that the magnitude of Ahf,ab at the As(1) site changes at around 20 K owing to emerging the heavy-fermion state, which was also observed in Ahf at the As(2) site and in H k c. The sign of Ahf,ab at the As(1) site is negative in low temperature. These are important for the analysis of the NMR results of CeRh2As2 in the superconducting state. © 2023 The Korean Physical Society. All rights reserved.
