Microscopic investigation of triangular-lattice antiferromagnet CeLi<sub>3</sub>Bi<sub>2</sub>
ORAL
Abstract
4f-electon triangular-lattice system CeLi3Bi2 is a semimetal and stripy antiferromagnet with TN = 1.28 K. Here, to gain microscopic insights into static and dynamic local magnetism, we performed 7Li nuclear magnetic resonance (NMR) measurements combined with thermodynamic and neutron diffraction measurements. NMR local dynamic spin susceptibility reveals a weak Kondo screening and competing RKKY interactions. In addition, short-range magnetic inhomogeneity with easy-plane fluctuations is observed below T* = 25 K. Our combined results indicate that CeLi3Bi2 is a promising candidate for tuning the interplay between geometric frustration and RKKY physics.
*Work at Los Alamos was supported by the U.S. Department of Energy, Office of Basic Energy Sciences “Quantum Fluctuations in Narrow Band Systems” program. Neutron powder diffraction and high-field measurements were supported by the U.S. Department of Energy, Office of Science, National Quantum Information Sciences Research Centers, Quantum Science Center. MB and CG acknowledge support from the Laboratory Directed Research and Development program. Scanning electron microscope and energy dispersive X-ray measurements were performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy Office of Science. A portion of this research used resources at the High Flux Isotope Reactor a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.
