Anisotropic electrical resistance in mesoscopic LaAlO₃/SrTiO₃ devices with individual domain walls.

ABSTRACT: The crystal structure of bulk SrTiO₃(STO) transitions from cubic to tetragonal at around 105 K. Recent local scanning probe measurements of LaAlO₃/SrTiO₃ (LAO/STO) interfaces indicated the existence of spatially inhomogeneous electrical current paths and electrostatic potential associated with the structural domain formation in the tetragonal phase of STO. Here we report a study of temperature dependent electronic transport in combination with the polarized light microscopy of structural domains in mesoscopic LAO/STO devices. By reducing the size of the conductive interface to be comparable to that of a single tetragonal domain of STO, the anisotropy of interfacial electron conduction in relationship to the domain wall and its direction was characterized be

SUBMITTER: Goble NJ 

PROVIDER: S-EPMC5353628 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature