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Title: Shape-deformation-driven structural transitions in quantum hall skyrmions
Authors: Rao, Madan
Sengupta, Surajit
Shankar, R.
Issue Date: 1997
Publisher: American Physical Society
Citation: Physical Review Letters, 1997, Vol.79, p3998
Abstract: The quantum Hall ground state away from ν = 1 can be described by a collection of interacting Skyrmions. We show within the context of a nonlinear sigma model that the classical ground state away from ν = 1 is a Skyrmion crystal with a generalized Néel order. As a function of filling factor ν and Landé factor g, the Skyrmion crystal undergoes a triangle --> square --> triangle transition at zero temperature. We argue that this structural transition is driven by a change in the shape of the individual Skyrmions and may be probed experimentally. Quantum fluctuations lead to an orientationally disordered phase at low Skyrmion densities.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0031-9007
1079-7114 (Onnline)
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Copyright: 1997, American Physical Society
Appears in Collections:Research Papers (TP)

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