High Resolution Study of Magnetic Ordering at Absolute Zero

TL;DR

This study investigates the quantum critical behavior of chromium doped with vanadium at absolute zero, revealing a sharp Hall coefficient change and significant quantum fluctuation effects at elevated temperatures.

Contribution

It provides high-resolution experimental insights into quantum criticality in a strongly correlated electron system, highlighting the effects of quantum fluctuations.

Findings

Sharp doubling of the Hall coefficient at the quantum critical point

Quantum fluctuations influence behavior up to high temperatures

Characterization of quantum critical behavior in an elemental antiferromagnet

Abstract

High fidelity pressure measurements in the zero temperature limit provide a unique opportunity to study the behavior of strongly interacting, itinerant electrons with coupled spin and charge degrees of freedom. Approaching the exactitude that has become the hallmark of experiments on classical critical phenomena, we characterize the quantum critical behavior of the model, elemental antiferromagnet chromium, lightly doped with vanadium. We resolve the sharp doubling of the Hall coefficient at the quantum critical point and trace the dominating effects of quantum fluctuations up to surprisingly high temperatures.