Glassy Relaxation Dynamics in the Two-Dimensional Heavy Fermion Antiferromagnet CeSiI

• DOI: 10.1021/acs.nanolett.4c05920
• Publication Date: 2025-04-16T14:48:42Z
• Authors: Kierstin Torres; Joon Young Park; Victoria A. Posey; Michael E. Ziebel; Claire E. Casaday; Kevin J. Anderton; Dongtao Cui; Benjamin Tang; Takashi Taniguchi; Kenji Watanabe; Abhay N. Pasupathy; Xavier Roy; Philip Kim
• Keywords: Dynamics

The recent discovery of the van der Waals (vdW) layered heavy fermion antiferromagnetic metal CeSiI offers promising potential for achieving accessible quantum criticality in two-dimensional (2D) limit. exhibits both behavior and (AFM) ordering, while exact magnetic structure phase diagram are yet to be determined. Here, we investigate properties atomically thin devices with thicknesses ranging from 2 15 vdW layers. thickness-dependent magnetotransport measurement reveals intrinsic 2D nature antiferromagnetism. Notably, also find an isotropic, time-dependent hysteresis magnetoresistance Hall resistance, showing glassy relaxation dynamics. This structures may suggest presence spin glass phases or multipolar further establishing as intriguing material system investigating interplay between orders Kondo effect.