Bound States of Skyrmions and Merons near the Lifshitz Point
| Autor: | Maxim Mostovoy, Oleg P. Sushkov, Yaroslav A. Kharkov |
|---|---|
| Přispěvatelé: | Theory of Condensed Matter |
| Rok vydání: | 2017 |
| Předmět: |
DYNAMICS
Nuclear Theory High Energy Physics::Lattice FOS: Physical sciences General Physics and Astronomy Pattern Formation and Solitons (nlin.PS) 02 engineering and technology 01 natural sciences Topological defect Nuclear Theory (nucl-th) Condensed Matter - Strongly Correlated Electrons Lattice (order) MAGNETIC SKYRMIONS 0103 physical sciences Bound state 010306 general physics Topological quantum number Phase diagram Physics Quantum Physics Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics PHASE-DIAGRAM Skyrmion REAL-SPACE OBSERVATION Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Nonlinear Sciences - Pattern Formation and Solitons Magnetic field MODEL CRYSTALS LATTICE FERROMAGNETS Ferromagnetism Quantum Physics (quant-ph) 0210 nano-technology |
| Zdroj: | Physical Review Letters, 119(20):207201. AMER PHYSICAL SOC |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.119.207201 |
| Popis: | We study topological defects in anisotropic ferromagnets with competing interactions near the Lifshitz point. We show that skyrmions and bi-merons are stable in a large part of the phase diagram. We calculate skyrmion-skyrmion and meron-meron interactions and show that skyrmions attract each other and form ring-shaped bound states in a zero magnetic field. At the Lifshitz point merons carrying a fractional topological charge become deconfined. These results imply that unusual topological excitations may exist in weakly frustrated magnets with conventional crystal lattices. 5 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|