Abstrakt

Spin Superfuidity in the Frustrated Two-Dimensional Anisotropic XY Model

LS Lima

We use the SU(3) Schwinger’s boson theory to study the spin transport properties in the two dimensional anisotropic frustrated Heisenberg model in the triangular lattice at T = 0. We have investigated the behavior of the spin conductivity for this model which presents an single-ion anisotropy. We study the spin transport in the Bose-Einstein condensation regime where we have that the tz bosons are condensed and the following condition is valid: ⟨tz⟩ = ⟨⟩ = t. Our results show a metallic spin transport for > 0 and a superfluid spin transport in the limit of DC conductivity, →0, where () tends to infinity in this limit of 