Two-dimensional solitons in spin nematic states for magnets with an isotropic exchange interaction

Autor:	O. A. Kosmachev, E. G. Galkina, Yu. A. Fridman, Boris A. Ivanov
Rok vydání:	2015
Předmět:	Physics Physics and Astronomy (miscellaneous) Magnetic moment Condensed matter physics Exchange interaction General Physics and Astronomy Vortex Ferromagnetism Condensed Matter::Superconductivity Magnet Quadrupole Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Spin-½
Zdroj:	Low Temperature Physics. 41:382-389
ISSN:	1090-6517 1063-777X
Popis:	A study of two-dimensional topological vortex-like solitons, for spin nematic states in magnets with spin S = 1 and S = 3/2. Depending on the parameters of the magnet, we get either pure multipole vortices, with a quadrupole parameter for S = 1, or an octupole parameter for S = 3/2, or vortices with a non-singular core. A vortex core corresponds to a macroscopic area with a disrupted nematic order. A transition to core vortices occurs at critical values of the system parameters. In this case, there is either the formation of a ferromagnetic vortex with a saturated magnetic moment in the core, or a vortex with an antiferromagnetic order at the core. The dynamic properties of the vortex with a ferromagnetic core are characterized by the presence of a gyroforce, whereas vortices with an antiferromagnetic core are Lorentz-invariant, which is typical for sigma-model antiferromagnets.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d05e8a3395a6bcff92ca637d8747ec8c https://doi.org/10.1063/1.4921470 Zobrazit plný text záznamu