Rao, Madan ; Sengupta, Surajit ; Shankar, R. (1997) Shape-deformation-driven structural transitions in quantum hall skyrmions Physical Review Letters, 79 (20). pp. 3998-4001. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v79/i20/p3998_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.79.3998
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.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 67269 |
Deposited On: | 29 Oct 2011 11:52 |
Last Modified: | 29 Oct 2011 11:52 |
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