Charge writing at the LaAlO3/SrTiO3 surface

Abstract

Biased conducting-tip atomic force microscopy (AFM) has been shown to write and erase nanoscale metallic lines at the LaAlO3/SrTiO3 interface. Using various AFM modes, we show the mechanism of conductivity switching is the writing of surface charge. These charges are stably deposited on a wide range of LaAlO3 thicknesses, including bulk crystals. A strong asymmetry with writing polarity was found for 1 and 2 unit cells of LaAlO3, providing experimental evidence for a theoretically predicted built-in potential.

12 pages, 4 figures, plus supplementary information, submitted to Nano Letters

References in corpus (2)

• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion
• Modulation Doping of a Mott Quantum Well by a Proximate Polar Discontinuity

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• Surface defects and conduction in polar oxide heterostructures
• Origin of two-dimensional electron gases at oxide interfaces: insights from theory
• Nanoscale Phenomena in Oxide Heterostructures
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• In-plane electronic confinement in superconducting LaAlO${}_3$/SrTiO${}_3$ nanostructures
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• Termination control of electronic phases in oxide thin films and interfaces: LaAlO3/SrTiO3(001)
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• Tuning the Electronic Properties of LAO/STO Interfaces by Irradiating LAO Surface with Low-Energy Cluster Ion Beams
• Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures
• Laterally-confined two-dimensional electron gases in self-patterned LaAlO3/SrTiO3 interfaces
• Buried Moire supercells through SrTiO${}_3$ nanolayer relaxation
• Thermal Activation and Quantum Field Emission in a Sketch-Based Oxide Nano Transistor
• Direct Imaging of Sketched Conductive Nanostructures at the LaAlO3/SrTiO3 Interface
• Influence of gas ambient on charge writing at the LaAlO3/SrTiO3 heterointerface
• Hard x-ray angle-resolved photoemission from a buried high-mobility electron system
• Surface charge writing and non-volatile control of superconductivity in LaAlO3/KTaO3(111) heterostructure
• Formation of a conducting LaAlO${}_3$ / SrTiO${}_3$ interface studied by low energy electron reflection during growth
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