2020/03/31 by Deepak S. Kathyat, Arnob Mukherjee, Sanjeev Kumar · 23 citations
Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Ferromagnetism #Hamiltonian (control theory) #Isotropy #Magnetic Properties and Applications #Magnetic properties of thin films #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin model #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.102.075106
published in Physical review. B./Physical review. B 102(7) (American Physical Society) · A sign mistake in the derivation is corrected in the 2nd version. Figures have been updated
openalex created_date 2020/04/03 · arxiv created 2020/04/29 · openalex publication_date 2020/08/05 · arxiv updated 2020/08/12 · openalex updated_date 2026/08/05
We derive and study a microscopic spin Hamiltonian on a lattice for Rashba-coupled double exchange metals. The Hamiltonian consists of anisotropic interactions of the Dzyaloshinskii-Moriya and pseudodipolar 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.