SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 9: Cooperative Phenomena: Spin Structures and Magnetic Phase Transitions
MA 9.9: Vortrag
Montag, 27. März 2023, 17:15–17:30, HSZ 401
Charge dynamics of heavy fermions near their quantum critical point — •Renjith Mathew Roy1, Run Yang1, Sooheyon shin2, Seulki Roh1, and Martin Dressel1 — 11. Physikslisches Instiut, Universität stuttgart, Germany — 2Laboratory for Multiscale Materials Experiments, Paul Scherrer Institut, Switzerland
Using infrared spectroscopy, we investigate the evolution of hybridization strength between the localized magnetic moments and itinerant electrons in heavy fermionic compound CeRh(In1-xSnx)5, with three different Sn concentrations, Sn 4.4%, Sn 6.9%, and 9.8% respectively. CeRhIn5 has an antiferromagnetic ground state, which is suppressed with Sn doping revealing a quantum-critical region. From our optical conductivity result, we report an enhancement of hybridization strength with increasing Sn concentration, and the observation of a non-Fermi liquid behaviour near the quantum critical point. The phase characterization was performed by magnetic susceptibility and resistivity measurements, which also support the non-Fermi liquid behavior observed near the quantum critical point.