Abstract
Heavy fermion system, c characterized by the intense renormalization of carrier mass due to the Kondo effect and π−π hybridization, have long been a focal point in condensed matter physics for studying quantum criticality and unconventional superconductivity. Traditionally, these phenomena are explored in bulk intermetallic compounds. However, realizing and tuning heavy fermion physics in the two-dimensional (2D) limit remains a significant challenge yet offers unprecedented opportunities for device integration. I will first discuss the motivation for using 2D intercalation as a platform to engineer strongly correlated electronic states. Unlike traditional bulk synthesis, 2D intercalation allows for precise control over the stacking order and coupling strength between the itinerant conduction electrons and the localized magnetic moments. To further investigate the emergent physical properties, I performed low-temperature electrical transport measurements on micro-devices fabricated from these intercalated flakes. The experimental results, including temperature-dependent resistivity and magnetoresistance, reveal a clear Kondo-like scattering behavior at low temperatures and a significant enhancement of the effective mass, should be evidenced by the large π΄coefficient in the π2 power law of reistivity. Furthermore, Hall effect measurements would suggest a reconstruction of the Fermi surface resulting from the hybridization of π−πππππ‘πππ and conduction bands.
Anyone interested is welcome to attend.