Metallicity of the SrTiO3 surface induced by room temperature evaporation of alumina

Abstract

It is shown that a metallic state can be induced on the surface of SrTiO3 crystals by the electron beam evaporation of oxygen deficient alumina or insulating granular aluminium. No special preparation nor heating of the SrTiO3 surface is needed. Final metallic or insulating states can be obtained depending on the oxygen pressure during the evaporation process. Photoconductivity and electrical field effect are also demonstrated.

8 pages, 3 figures

References in corpus (8)

• Why Some Interfaces Cannot be Sharp
• The role of oxygen vacancies in SrTiO3 at the LaAlO3/SrTiO3 interface
• High Mobility in LaAlO3/SrTiO3 Heterostructures: Origin, Dimensionality and Perspectives
• Origin of charge density at LaAlO3-on-SrTiO3 hetero-interfaces; possibility of intrinsic doping
• Mapping the Spatial Distribution of Charge Carriers in LaAlO3/SrTiO3 Heterostructures
• Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures
• Field-Effect Transistor on SrTiO3 with sputtered Al2O3 Gate Insulator
• Metal-insulator transition on SrTiO${}_3$ surface induced by ionic-bombardment

Cited by in corpus (8)

• Origin of the two-dimensional electron gas at LaAlO3/SrTiO3 interfaces: The role of oxygen vacancies and electronic reconstruction
• Universal Fabrication of Two-Dimensional Electron Systems in Functional Oxides
• High-Mobility Two-Dimensional Electron Gases at Oxide Interfaces: Origins and Opportunities
• Gate-tunable superconductivity at SrTiO3 surface realized by Al layer evaporation
• Gate voltage control of the $Al{O}_x$/$SrTi{O}_3$ interface electrical properties
• Non-collinear and strongly asymmetric polar moments at back-gated SrTiO3 interfaces
• Conducting and insulating LaAlO${}_3$/SrTiO${}_3$ interfaces: A comparative surface photovoltage investigation
• Lithography-free patterning of SrTiO${}_3$-based two-dimensional electron gases using direct atomic layer processing