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Related Experiment Videos

High resolution study of magnetic ordering at absolute zero.

M Lee1, A Husmann, T F Rosenbaum

  • 1The James Franck Institute and Department of Physics, The University of Chicago, Chicago, IL 60637, USA.

Physical Review Letters
|June 1, 2004
PubMed
Summary

High-pressure measurements reveal quantum critical behavior in vanadium-doped chromium. Researchers observed a doubling of the Hall coefficient, indicating quantum fluctuations persist at higher temperatures.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials Science

Background:

  • Studying strongly interacting itinerant electrons requires precise measurements at low temperatures.
  • Quantum critical phenomena in magnetic materials offer insights into fundamental electronic behaviors.

Purpose of the Study:

  • To investigate the quantum critical behavior of chromium doped with vanadium under high pressure.
  • To understand the interplay of spin and charge degrees of freedom in strongly correlated electron systems.

Main Methods:

  • High-resolution pressure measurements at the zero-temperature limit.
  • Characterization of the quantum critical point in a model antiferromagnet.

Main Results:

  • Observed a sharp doubling of the Hall coefficient at the quantum critical point.

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  • Demonstrated the significant influence of quantum fluctuations up to unexpectedly high temperatures.

    • Conclusions:

    • High-pressure studies are crucial for understanding quantum criticality in electron systems.
    • Vanadium doping in chromium provides a unique system to explore quantum fluctuations and their temperature dependence.