Field Tuned Non Fermi Liquid Behavior and Quantum Criticality in a Kagome/Triangular Lattice Metal

The RT6X6 family of transition metal based metallic compounds (R = rare earth, T = transition metal, X = Sn or Ge) hosts geometrically frustrated Kagome/Triangular lattices that provide an ideal platform for studying unconventional magnetic states and correlated electron phenomena. We investigate the temperature and magnetic field dependence of the electrical transport in a metallic compound exhibiting antiferromagnetic order at low temperature. The zero field resistivity shows metallic behavior with an inflection near 60 K, likely linked to crystal electric field effects, and a low temperature anomaly associated with magnetic ordering. When a magnetic field is applied, the transition is gradually suppressed, yielding linear in T resistivity near a critical field, indicative of non Fermi liquid behavior. At higher fields, quadratic in T dependence reappears, marking a crossover to Fermi liquid transport. These results establish this Kagome/Triangular lattice metal as a promising platform for exploring field tuned quantum criticality.