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Article overview
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Vortices in Quantum Spin Systems | John Schliemann
; Franz G. Mertens
; | Date: |
30 Sep 1998 | Journal: | Eur. Phys. J. B 9, 237 (1999) | Subject: | Condensed Matter; Pattern Formation and Solitons | cond-mat nlin.PS patt-sol quant-ph | Abstract: | We examine spin vortices in ferromagnetic quantum Heisenberg models with planar anisotropy on two-dimensional lattices. The symmetry properties and the time evolution of vortices built up from spin-coherent states are studied in detail. Although these states show a dispersion typical for wave packets, important features of classical vortices are conserved. Moreover, the results on symmetry properties provide a construction scheme for vortex-like excitations from exact eigenstates, which have a well-controlled time evolution. Our approach works for arbitrary spin length both on triangular and square lattices. | Source: | arXiv, cond-mat/9809401 | Services: | Forum | Review | PDF | Favorites |
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