Universally diverging Grüneisen ratio of holographic quantum criticality

Quantum criticality is a hallmark of strongly correlated electron systems, as seen in heavy-fermion materials and high-temperature superconductors. Holographic duality provides a powerful framework to investigate these systems by translating them into weakly coupled classical gravity living in one higher dimension. Here, we exploit this approach to study a field-induced quantum critical point with dynamical exponentin Einstein-Maxwell-Chern-Simons theory. Our analysis of its thermodynamic properties reveals a new universality class. Notably, we identify a diverging Grüneisen ratiowith universal scaling, a behavior that closely mirrors recent experiments on the heavy-fermion material CeRhGe. These findings advance our understanding of metallic quantum criticality and highlight the potential of holographic duality as a powerful tool for studying correlated quantum matter as well as its magnetocaloric applications.