Quantum critical spin-liquid-like behavior in the = quasikagome-lattice compound CeRhPdSn investigated using muon spin relaxation and neutron scattering
スピン擬カゴメ格子系CeRhPdSnにおける量子臨界スピン液体的挙動のミュオンスピン緩和と中性子散乱による研究
Tripathi, R.*; Adroja, D. T.*; Ritter, C.*; Sharma, S.*; Yang, C.*; Hillier, A. D.*; Koza, M. M.*; Demmel, F.*; Sundaresan, A.*; Langridge, S.*; 髭本 亘 ; 伊藤 孝 ; Strydom, A. M.*; Stenning, G. B. G.*; Bhattacharyya, A.*; Keen, D.*; Walker, H. C.*; Perry, R. S.*; Pratt, F.*; Si, Q.*; 高畠 敏郎*
Tripathi, R.*; Adroja, D. T.*; Ritter, C.*; Sharma, S.*; Yang, C.*; Hillier, A. D.*; Koza, M. M.*; Demmel, F.*; Sundaresan, A.*; Langridge, S.*; Higemoto, Wataru; Ito, Takashi; Strydom, A. M.*; Stenning, G. B. G.*; Bhattacharyya, A.*; Keen, D.*; Walker, H. C.*; Perry, R. S.*; Pratt, F.*; Si, Q.*; Takabatake, Toshiro*
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.