Symplectic N and time reversal in frustrated magnetism - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Symplectic N and time reversal in frustrated magnetism - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: Identifying the time reversal symmetry of spins as a symplectic symmetry, wedevelop a large N approximation for quantum magnetism that embraces bothantiferromagnetism and ferromagnetism. In SUN, N>2, not all spins invertunder time reversal, so we have introduced a new large N treatment which buildsinteractions exclusively out of the symplectic subgroup SPN of timereversing spins, a more stringent condition than the symplectic symmetry ofprevious SPN large N treatments. As a result, we obtain a mean field theorythat incorporates the energy cost of frustrated bonds. When applied to thefrustrated square lattice, the ferromagnetic bonds restore the frustrationdependence of the critical spin in the Neel phase, and recover the correctfrustration dependence of the finite temperature Ising transition.



Author: Rebecca Flint, P. Coleman

Source: https://arxiv.org/



DOWNLOAD PDF




Related documents