Quantum critical spin-liquid-like behavior in the = quasikagome-lattice compound CeRhPdSn investigated using muon spin relaxation and neutron scattering

Tripathi, R.*; Adroja, D. T.*; Ritter, C.*; Sharma, S.*; Yang, C.*; Hillier, A. D.*; Koza, M. M.*; Demmel, F.*; Sundaresan, A.*; Langridge, S.*; et al.

Physical Review B, 106(6), p.064436_1 - 064436_17, 2022/08

https://doi.org/10.1103/PhysRevB.106.064436

We present the results of muon spin relaxation (SR) and neutron scattering measurements on the Ce-based quasikagome lattice CeRhPdSn ( = 0.1 to 0.75). Our SR results reveal the absence of both static long-range magnetic order and spin freezing down to 0.05 K in the = 0.1 sample, which is consistent with neutron scattering results. The weak temperature-dependent plateaus of the dynamic spin fluctuations below 0.2 K in zero field together with its longitudinal-field (LF) dependence indicate the presence of dynamic spin fluctuations persisting even at 0.05 K without static magnetic order. We argue that such a behavior for = 0.1 can be attributed to a metallic spin-liquid-like ground state near the quantum critical point in the frustrated Kondo lattice. The LF-SR study suggests that the out of kagome plane spin fluctuations are responsible for the spin-liquid behavior.