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Microscopic magnetic Hamiltonian for exotic spin textures in metals
- Source :
- Physical Review B. 102
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- We derive a new microscopic spin Hamiltonian for Rashba-coupled double exchange metals. The Hamiltonian consists of anisotropic interactions of the Dzyaloshinskii-Moriya (DM) and Kitaev form, in addition to the standard isotropic term. We validate the spin Hamiltonian by comparing results with those on the exact spin-fermion model, and present its phase diagram using large scale Monte Carlo simulations. In addition to ferromagnetic, planar spiral and flux states, the model hosts skyrmion crystal and classical spin-liquid states characterized, respectively, by multiple peaks and a diffuse ring pattern in the spin structure factor. The filamentary domain wall structures in the spin-liquid state are in remarkable agreement with experimental data on thin films of MnSi-type B20 metals and transition metals and their alloys.<br />Comment: A sign mistake in the derivation is corrected in the 2nd version. Figures have been updated
- Subjects :
- Physics
Strongly Correlated Electrons (cond-mat.str-el)
Condensed matter physics
Skyrmion
Isotropy
Monte Carlo method
FOS: Physical sciences
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Condensed Matter - Strongly Correlated Electrons
symbols.namesake
Transition metal
Ferromagnetism
0103 physical sciences
symbols
Condensed Matter::Strongly Correlated Electrons
010306 general physics
0210 nano-technology
Hamiltonian (quantum mechanics)
Anisotropy
Phase diagram
Subjects
Details
- ISSN :
- 24699969 and 24699950
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....8ee5254c4654dc351ad42760e455a289