  Spin-polarized two-dimensional electron gas (2DEG) at oxide interfaces is an
emerging physical phenomenon, which is technologically important for potential
device applications. However, most previous relevant studies only focused on
the creation and characterization of the spin-polarized 2DEG. To push forward
the device applications, the control of spin-polarized 2DEG by electric field
is an important step. Here, a model system based on antiferromagnetic and
ferroelectric perovskites, i.e., YTiO3/PbTiO3 superlattice, is designed to
manipulate the spin-polarized 2DEG. By switching the direction of polarization,
the spin-polarized 2DEG can be effectively tuned for both symmetric interfaces
and asymmetric polar interfaces.
