Frustration induced spontaneous antiferromagnetic skyrmion/antiskyrmion crystal in the triangular lattice

H. D. ROSALES

Congreso; 17th International Seminar on Condensed Matter and Statistical Physics; 2022

Universidad de La Frontera, Departamento de Ciencias Físicas, Casilla 54-D, Temuco, Chile

(Charla) Magnetic skyrmions are particle-like spin textures of topological origin found in several magnetic systems. They are characterized by their small size, high stability, and ease of manipulation via electric current [1]. In this context, emerge the antiferromagnetic (AF) skyrmions have recently become the subject of intense focus [2,3] due to new features and huge benefits (ultra-small skyrmion sizes, no transverse deflection and efficient manipulation) [4]. In this work we study the possibility of stabilising these topological textures only by magnetic frustration in the triangularlattice. Using the Luttinger-Tisza approximation and large scale Monte-Carlo simulations, we show that the phase diagram of the J1-J2-J3 Heisenberg model on the triangular lattice includes exotic multiple-q phases, degenerate states and a spontaneous AF-SkL/ASkL lattice at intermediate magnetic fields. These findings greatly enrich the research on antiferromagnetic skyrmions in centrosymmetric materials. [1] Fert, A., Reyren, N. , Cros, V., Nat Rev Mater 2, 17031 (2017).[2] H. D. Rosales, D. C. Cabra, and Pierre Pujol, Phys. Rev. B 92, 214439 (2015).[3] Gao, S., Rosales, H.D., G ́omez Albarrac ́ın, F.A. et al., Nature 586, 37-41 (2020).[4] B ̈orge G ̈obel, Ingrid Mertig, Oleg A. Tretiakov, Physics Reports 895, 1-28 (2021).