Electrical control of spin-texture in non-magnetic ferroelectric oxide-based systems

Upon inversion symmetry breaking, spin-orbit coupling allows for spin-dependent electronic structures, even in the absence of long-range magnetic ordering. Given the prerequisite of showing a polar axis (in addition to being non-centrosymmetric), ferroelectrics are not only natural candidates for this kind of phenomena, but they also offer intriguing perspectives to control/induce/switch spin-textures with an electric field that switches the ferroelectric polarization. I will focus on several types of mechanisms to achieve the goal, ranging from Rashba spin-splitting to spin-valley coupling, with possible links to topologically non-trivial behaviour. Based on density functional simulations, I will show several realizations in ferroelectric oxide-based systems, where the k-dependent spin texture is one-to-one linked to polarization.