The search for quantum critical scaling in a classical system

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The search for quantum critical scaling in a classical system

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8189

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Title: The search for quantum critical scaling in a classical system
Author: Lamsal, Jagat; Gaddy, John; Petrovic, Marcus; Montfrooij, Wouter; Vojta, Thomas
Keywords: magnetic phase boundaries
spin arrangements in magnetically ordered materials
order-disorder transformations
statistical mechanics of model systems
Date: 2009-03-12
Publisher: American Institute of Physics
Citation: J. Appl. Phys. 105, 07E322 (2009)
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
ISSN: 0021-8979

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