IFLYSIB   05383
INSTITUTO DE FISICA DE LIQUIDOS Y SISTEMAS BIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Field induced topological phases in the kagome Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interaction
Autor/es:
M. E. VILLALBA; D. C. CABRA; H. D. ROSALES; F. A. GÓMEZ ALBARRACÍN
Lugar:
Ciudad de Buenos Aires
Reunión:
Conferencia; StatPhys 27; 2019
Institución organizadora:
UBA
Resumen:
We study the effect of an in-plane Dzyaloshinskii-Moriya interaction under an external magnetic field in the highly frustrated kagome antiferromagnet. We focus on the low-temperature phase diagram, which we obtain through extensive Monte-Carlo simulations. We show that, given the geometric frustration of the lattice, highly non trivial phases emerge. We characterize these phases mainly through a topological order parameter, the scalar chirality. We pay particular attention to the intermediate magnetic fields region, where swirling spin structures arise stabilizing a canted-skyrmion/"meron-like" phase. This phase consists of a cristal arrangement of three interpenetrated non-Bravais lattices of textures similar to skyrmions, but with a non-polarized core, and the chirality parameter is closely related to the number of these structures, Q. As the field increases, the cores are almost orthogonal to the field, and are progressively canted, given rise to a Q