Quantum criticality in an itinerant antiferromagnet

Recent x-ray diffraction measurements have revealed a pressure-tuned continuous quantum phase transition in antiferromagnetic Cr [1]. High pressure transport results expose a crossover to a narrow fluctuation-dominated quantum critical regime at high pressure and low temperature. The discovery and description of a continuous quantum critical regime in this pure model system has broad implications for studies of quantum criticality and marginally magnetic materials. \\[4pt] [1] R. Jaramillo, Yejun Feng \textit{et al}. Nature \textbf{459}, 405 (2009).