External electromagnetic effects on the spin transport of the open one-dimensional single-band Fermi-Hubbard lattice

Abstract

Experimentally, conductivities help probe phases of matter among strongly correlated systems. In this study, the effect of external electromagnetic field on the spin conductivity of an open one-dimensional single-band Fermi-Hubbard lattice is calculated with the assumption of linear response. It is shown that for repulsive two-particle interactions, the spin conductivity can be optimized at finite low-temperature when the lattice is subject to a strong magnetic field and a more positive electric field. On the other hand, external electromagnetic fields drive the spin conductivity to an asymptotic behavior when the two-particle interactions are attractive.