Universal scaling functions of the magnetic Grüneisen ratio near quantum critical points (opens in new tab)

The magnetic Grüneisen ratio, defined as Γg ≡ (1/T)(∂T/∂g)S, characterizes the magnetocaloric effect (MCE) driven by an external field g and serves as a highly sensitive probe for field-induced quantum critical points (QCPs). Near a QCP, Γg displays diverging behaviors described by a universal scaling function depending on the universality class. Here, we systematically investigate the universal scaling functions of Grüneisen ratio Γg in typical one-dimensional (1D) and two-dimensional (2D) q...