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 exponentz= 3 in Einstein-Maxwell-Chern-Simons theory. Our analysis of its thermodynamic properties reveals a new universality class. Notably, we identify a diverging Grüneisen ratio ΓBwith universal scaling ΓB∼T-2/3, a behavior that closely mirrors recent experiments on the heavy-fermion material CeRh6Ge4. These findings advance our understanding of metallic quantum criticality and highlight the potential of holographic duality as a powerful tool for studying correlated quantum matters as well as their magnetocaloric applications.