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    The search for quantum critical scaling in a classical system

    Lamsal, Jagat
    Gaddy, John
    Petrovic, Marcus
    Montfrooij, Wouter
    Vojta, Thomas
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    [PDF] SearchQuantumCriticalScaling.pdf (427.3Kb)
    Date
    2009
    Format
    Article
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    Abstract
    Order-disorder phase transitions in magnetic metals that occur at zero temperature have been studied in great detail. Theorists have advanced scenarios for these quantum critical systems in which the unusual response can be seen to evolve from a competition between ordering and disordering tendencies, driven by quantum fluctuations. Unfortunately, there is a potential disconnect between the real systems that are being studied experimentally, and the idealized systems that theoretical scenarios are based upon. Here we discuss how disorder introduces a change in morphology from a three-dimensional system to a collection of magnetic clusters, and we present neutron scattering data on a classical system, Li[Mn1.96Li0.04]O4, that show how magnetic clusters by themselves can lead to scaling laws that mimic those observed in quantum critical systems.
    URI
    http://hdl.handle.net/10355/8189
    Citation
    J. Appl. Phys. 105, 07E322 (2009)
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    • Physics and Astronomy publications (MU)
    • Missouri Research Reactor publications (MU)
    • Missouri Research Reactor publications (MU)

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