Colloquium
Department of Physics, NCU
To order or not to order, that is the question: a magnetic quantum phase transition
Prof. 黃建龍 (Chien-Lung Huang)
Department of Physics, National Cheng Kung University
Date 2021.10.12 (Tue)
Place S4-625
Time 14:00-16:00
Abstract: Exotic physical properties, arising from quantum mechanical interactions between quasiparticles, emerge near the boundary between magnetic order and disorder phase. In my talk, I will present experimental signatures of one such example: a ferromagnetic (FM) alloy Ni1-xRhx. For x = 0.375, the system exhibits a rare FM quantum critical point (QCP), evidenced by divergence of thermodynamic properties as the temperature approaches absolute zero. To uncover the FM QCP opens a new route, besides its antiferromagnetic counterpart, to emergent quantum phenomena, such as unconventional superconductivity and non-Fermi-liquid behavior.