Neutron scattering study of URu2−xRexSi2 (x=0.10): Driving order towards quantum criticality

We report inelastic neutron scattering measurements in the hidden order state of URu2−xRexSi2 with x=0.10. We observe that towards the ferromagnetic quantum critical point induced by the negative chemical pressure of Re doping, the gapped incommensurate fluctuations are robust and comparable in intensity to the parent material. As the Re doping moves the system toward the quantum critical point, the commensurate spin fluctuations related to …