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Interacting potential between spinons in the compact QED 3 description of the Heisenberg model

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  • R. Dillenschneider
  • J. Richert

Abstract

We implement a Chern-Simons (CS) contribution into the compact QED 3 description of the antiferromagnetic Heisenberg model in two dimensions at zero temperature. The CS term allows for the conservation of the SU(2) symmetry of the quantum spin system and fixes the flux through a plaquette to be a multiple of π as was shown by Marston. We work out the string tension of the confining potential which acts between the spinons and show that the CS term induces a screening effect on the magnetic field only. The confining potential between spinons is not affected by the CS flux. The strict site-occupation by a single spin 1/2 is enforced by the introduction of an imaginary chemical potential constraint. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Suggested Citation

  • R. Dillenschneider & J. Richert, 2008. "Interacting potential between spinons in the compact QED 3 description of the Heisenberg model," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 61(3), pages 325-329, February.
    • Handle: RePEc:spr:eurphb:v:61:y:2008:i:3:p:325-329
    DOI: 10.1140/epjb/e2008-00076-2
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