Spin transport in the frustrated anisotropic two-dimensional ferromagnet in the square lattice

We use the SU(3) Schwinger boson formalism together with the Kubo theory of the linear response to study the spin transport in the two-dimensional S=1 frustrated anisotropic Heisenberg ferromagnet in a square lattice with easy-plane single-ion anisotropy and considering the second-neighbor interaction in the diagonal and the third-neighbor interaction (J(1)-J(2)-J(3) model). The AC spin conductivity sigma(reg)(omega) is determined for several values of the critical single-ion parameter D, and the frustration parameters J(2) and J(3). We have calculated the dynamic structure factor too, S((q) over right arrow, omega), for this model and obtained a behaviour exponentially decreasing for the damping Gamma(q) with the decreasing of q=vertical bar(q) over right arrow vertical bar towards q -> 0. (C) 2016 Elsevier Ltd. All rights reserved.