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Article Dans Une Revue Physical Review B Année : 2023

Monte Carlo studies of noncollinear magnetic phases in multiferroic Cu 2 OSeO 3

Résumé

Monte Carlo simulations based on a first-principles-derived Hamiltonian are conducted to study the finite -temperature properties of chiral-lattice multiferroic insulator Cu2OSeO3. The use of this numerical technique (i) reveals basic features of the phase diagram as a function of temperature and external magnetic field, including the long-range helical phase at low temperature and zero magnetic field and the skyrmion lattice phase, in which skyrmions are arranged in a two-dimensional hexagonal lattice, and (ii) leads to the discovery of an overlooked vortex lattice phase in a narrow pocket of the phase diagram near the fluctuations' disordered-helical phase transition. The scheme also provides strong numerical evidence that the transition to a helical state in Cu2OSeO3 is of first order driven by critical fluctuations.
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Dates et versions

hal-04279190 , version 1 (10-11-2023)

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Houssam Sabri, Igor Kornev. Monte Carlo studies of noncollinear magnetic phases in multiferroic Cu 2 OSeO 3. Physical Review B, 2023, 107 (2), pp.024417. ⟨10.1103/PhysRevB.107.024417⟩. ⟨hal-04279190⟩
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