Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5457260 | Solid State Communications | 2017 | 5 Pages |
Abstract
We have used the Schwinger's boson theory to study the spin transport in the anisotropic two-dimensional spatially frustrated Heisenberg antiferromagnetic model in the square lattice. Our results show a sudden change in the AC spin conductivity Ïreg(Ï) in the quantum phase transition point, where we have the gap of the system going to zero at critical point Dc=0. We have found a sudden change for a superconductor state in the DC limit Ïâ0 independent of the value of the Drude's weight found in the quantum phase transition point. Away from it, we have obtained that the behavior of the spin conductivity changes for single peak at Ï=Ïp and in this case, Ïreg(Ï) goes to zero in small Ï and large Ï limits.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
L.S. Lima,