Strain-induced conductivity accelerated recoveries in LaAlO₃/SrTiO₃ heterostructure with millimeter scale.

ABSTRACT: The transport and magnetic properties of LaAlO₃/SrTiO₃ (LAO/STO) heterostructure have been studied during cooling and warming. The strain gradient perpendicular to the surface of the heterostructure increases with the thickness of LAO film. The conductivity accelerated recoveries (CAR) are found at 80 K and 176 K in the interface of LAO/STO sample with millimeter scale, and are more obvious for thicker LAO layers during warming. These two recovering temperatures correspond to the migrating energies of oxygen single vacancy and divacancy trapped by polarized domain walls, separately. This indicated that domain walls diffuse along the longitudinal direction and expand to larger area due the strain gradient perpendicular to the interface. The stable and precise accelerat

SUBMITTER: Wang X 

PROVIDER: S-EPMC9089444 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature