Divergence of the Magnetic Grüneisen Ratio at the Field-Induced Quantum Critical Point in YbRh${}_2$Si${}_2$

Y. Tokiwa, T. Radu, P. Gegenwart +2

The heavy fermion compound YbRh${}_2$Si${}_2$ is studied by low-temperature magnetization $M(T)$ and specific-heat $C(T)$ measurements at magnetic fields close to the quantum critical…