Anomalous quantum criticality in an itinerant ferromagnet.

摘要: The dynamics of continuous phase transitions is governed by the dynamic scaling exponent relating correlation length and time. For at finite temperature, thermodynamic critical properties are independent exponent. In contrast, quantum where transition temperature becomes zero, static inherently entangled virtue uncertainty principle. Consequently, equations explicitly contain Here we report on measurements (as a function magnetic field) for itinerant ferromagnet Sr1-xCaxRuO3 zero x=0.7. We find magnetization specific heat with highly unusual dynamics. observe small 1.76 strongly deviating from current models ferromagnetic criticality likely being strong disorder in conjunction electron-electron coupling.