Nonlinear response induced by ferromagnetism in spin selective Kondo Insulator with Rashba SOC

Recently nonlinear response beyond linear response theory is energetically studied. Especially, in noncetrosymmetric systems, the second conductivity is allowed and then the intensity of the current can depend on the direction of input electric field. This effect is known as a nonreciprocal response. Nonreciprocal response is well-known in p-n junctions, however it has been recently proposed that nonreciprocal response can occur in the bulk of a material, which is studied in various situations.
Previous works about nonlinear response have focused on noninteracting systems, so interacting systems are poorly studied. However, recent studies shows that correlated effect (for example renormalization effect) is important in
nonlinear response more than linear response and that in an experiment nonlinear hall effect enhances in Wyle-Kondo System Ce3Bi4Pd3.
In this work, we analyze the nonlinear conductivity in a noncentrosymmetric Kondo Lattice with Rashba type spin orbit coupling (SOC). In this system, the second conductivity is nonzero in ferromagnetic phase. We analyze the Kondo system using DMFT and obtain the phase diagram. In ferromagnetic phase, we observe the spin selective Kondo insulator, so one spin state is an insulator and another is a metal. Then we obtain the spin polarized nonlinear response.