z=3 Antiferromagnetic Quantum Criticality Driven by the Kondo Effect

We find that the Kondo effect results in a new universality class for an antiferromagnetic (AF) quantum critical point (QCP) in the heavy fermion quantum transition, described by deconfined bosonic spinons ;with the dynamical exponent z = 3. We show that the thermodynamics and transport of the z = 3 AF QCP are consistent with the well-known non-Fermi liquid physics such as the divergent Gruneisen ratio with an exponent 2/3 and temperature-linear resistivity. We propose that the hallmark of the Kondo-driven AF QCP is a uniform spin susceptibility that diverges with an exponent 2/3, remarkably consistent with the experimental observations for YbRh2Si2.