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|Title:||Dipole and Quadrupole Skyrmions in S = 1 (pseudo)spin Systems|
|Authors:||Mikushina, N. A.|
Moskvin, A. S.
|Citation:||Mikushina N. A. Dipole and Quadrupole Skyrmions in S = 1 (pseudo)spin Systems / N. A. Mikushina, A. S. Moskvin // Physics Letters, Section A: General, Atomic and Solid State Physics. — 2002. — Vol. 302. — Iss. 1. — P. 8-16.|
|Abstract:||In terms of spin coherent states we have investigated topological defects in 2D S = 1 (pseudo)spin quantum system with the bilinear and biquadratic isotropic exchange in the continuum limit. The proper Hamiltonian of the model can be written as bilinear on the generators of SU(3) group (Gell-Mann matrices). Knowledge of such group structure enables us to obtain some new exact analytical results. The analysis of the proper classical model and its topology allows to get different skyrmionic solutions with finite energy and the spatial distribution of spin-dipole and/or spin-quadrupole moments termed as dipole, quadrupole, and dipole-quadrupole skyrmions, respectively. Among the latter we would like note the in-plane vortices with the in-plane distribution of spin moment, varying spin length, and the non-trivial distribution of spin-quadrupole moments. © 2002 Elsevier Science B.V. All rights reserved.|
|Keywords:||2D CLASSICAL AND QUANTUM SPIN SYSTEMS|
QUANTUM SPIN SYSTEMS
|metadata.dc.description.sponsorship:||We thank A.B. Borisov and R.A. Istomin for valuable discussions. The research described in this Letter was made possible in part by Award No. REC-005 of the US Civilian Research & Development Foundation for the Independent States of the Former Soviet Union (CRDF). The authors acknowledge a partial support from the Russian Ministry of Education, grant E00-3.4-280, and Russian Foundation for Basic Researches, grant 01-02-96404. One of us (A.M.) would like to thank for hospitality Institut für Festkörper- und Werkstofforschung Dresden.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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