Anisotropic superconducting properties of nanowires at the LaAlO$_3$/SrTiO$_3$ (110) interface
ORAL
Abstract
The superconducting properties of nanowires created on anisotropic SrTiO$_3$ (110) surfaces were investigated. Nanowires are created using conductive AFM (c-AFM) lithography at the LaAlO$_3$/SrTiO$_3$(110) interface along the (001) and (1$\bar{1}$0) crystallographic directions. In these devices we observe anisotropic superconductivity. The upper critical magnetic field along the (001) and (1$\bar{1}$0) directions are found to be markedly different with a superconducting dome that is shifted for the two orientations. These observations can be explained by anisotropic orbital binding of Ti and O atoms or the differences in the spin-orbit coupling along the two different directions.
*We gratefully acknowledge support for this work from NSF (DMR-1124131, DMR-1104191), AFOSR (FA9550-12-1-0057, FA9550-12-1-0268), and CRP-NRF (Tailoring Oxide Electronics).
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