Title: Elastocaloric effect in nematic and alter magnetic quantum criticality
When: Thursday, November 13, 2025, 12:00
Place: Department of Theoretical Condensed Matter Physics, Faculty of Sciences, Module 5, Seminar Room (5th Floor)
Speaker: Iksu Jang, Karlsruhe Institute of Technology, Karlsruhe, Germany
Due to the symmetry properties of the nematic order parameter, it is natural to expect a coupling between acoustic phonons and nematic fluctuations. The non-Fermi liquid behavior near the nematic quantum critical point is influenced by this coupling, leading to the emergence of conventional Fermi-liquid-like behavior in quantities such as the specific heat and fermion self-energy corrections below a temperature scale determined by the strength of the coupling. In this talk, we will discuss the elastocaloric effect (ECE)—the adiabatic temperature change under varying strain—and how the corresponding thermal expansion deviates from this expected pattern. We refer to this phonon-related deviation as the elastocaloric anomaly. Furthermore, we will explore how the results obtained in the nematic case can be extended to the altermagnetic case in the presence of an external magnetic field.
