Physical properties and correlated electron behavior of Kagome metal Cu3V2Sb4

We report the successful synthesis and comprehensive characterization of a Kagome metal Cu₃V₂Sb₄. This material exhibits a quadratic temperature dependence of resistivity over a broad temperature range, indicative of strong electronelectron interactions, as confirmed by specific heat measurements with the Kadowaki–Woods ratio lies between transition metal and heavy fermion systems. Magnetoresistance measurements reveal a linear magnetic field dependence at low temperatures, while Hall effect measurements display nonlinear behavior describable with a semi-classical two-band model. Angular-dependent magnetoresistance further reveals a twofold symmetry. These results collectively suggest an evolution of the band structure within the temperature range of 50 ~ 80 K. Magnetic susceptibility measurements indicate paramagnetic behavior with evidence of short-range magnetic correlations emerging near 25 K. Our findings broaden the material landscape of Kagome metals and provide a promising platform for exploring correlated electron states and topological quantum phenomena in novel quantum materials.

Ms. Mengqin Liu is a Ph.D. candidate in the School of Physics at Southeast University, specializing in condensed matter physics. She holds a Master's degree in Physics from Anhui University. Her research focuses on the physical properties and correlated electron behavior of Kagome materials. She has published two papers in Physical Review B (PRB) as the first author. She is currently investigating the electronic structure and topological phases in Kagome metals, with a particular interest in electronic properities under doping conditions.