Conducting interfaces between band insulating oxides: the LaGaO3/SrTiO3

Abstract

We show that the growth of the heterostructure LaGaO3/SrTiO3 yields the formation of a highly conductive interface. Our samples were carefully analyzed by high resolution electron microscopy, in order to assess their crystal perfection and to evaluate the abruptness of the interface. Their carrier density and sheet resistance are compared to the case of LaAlO3/SrTiO3 and a superconducting transition is found. The results open the route to widening the field of polar-non polar interfaces, pose some phenomenological constrains to their underlying physics and highlight the chance of tailoring their properties for future applications by adopting suitable polar materials.

in press Appl. Phys. Lett. 97, 1 (2010)

References in corpus (6)

• Magnetic effects at the interface between nonmagnetic oxides
• Origin of charge density at LaAlO3-on-SrTiO3 hetero-interfaces; possibility of intrinsic doping
• Avoiding the polarization catastrophe in LaAlO3 overlayers on SrTiO3(001) through a polar distortion
• Polar Discontinuity Doping of the LaVO_3/SrTiO_3 Interface
• Polar catastrophe and electronic reconstructions at the LaAlO3/SrTiO3 interface: evidence from optical second harmonic generation
• Electronic properties of buried hetero-interfaces of LaAlO3 on SrTiO3

Cited by in corpus (41)

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• Mixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO${}_3$
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• Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity
• High-Mobility Two-Dimensional Electron Gases at Oxide Interfaces: Origins and Opportunities
• Large band offset as driving force of 2-dimensional electron confinement: the case of SrTiO${}_3$/SrZrO${}_3$ interface
• Tuning the two-dimensional electron liquid at oxide interfaces by buffer-layer-engineered redox reactions
• Exchange Bias Induced by the Fe3O4 Verwey transition
• Critical influence of target-to-substrate distance on conductive properties of LaGaO3/SrTiO3 interfaces deposited at 10-1 mbar oxygen pressure
• Observation of a two-dimensional electron gas at CaTiO${}_3$ film surfaces
• Overcoming contrast reversals in focused probe ptychography of thick materials: an optimal pipeline for efficiently determining local atomic structure in materials science
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• Symmetry breaking at the (111) interfaces of SrTiO${}_3$ hosting a 2D-electron system
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• 2D surprises at the surface of 3D materials: confined electron systems in transition metal oxides
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• Top-seeded solution growth of SrTiO3 crystals and phase diagram studies in the SrO-TiO2 system
• Metallic Conductance at the Interface of Tri-color Titanate Superlattices
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• Tuning the superconducting transition of SrTiO${}_3$-based 2DEGs with light
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• Electron gas induced in SrTiO${}_3$
• Metallic interface in non-SrTiO3 based titanate superlattice
• Growth-Temperature Dependence of Conductivity at the LaCrO${}_3$/SrTiO${}_3$ (001) Interface
• High-mobility two-dimensional electron gas in $\gamma$-Al${}_2$O${}_3$/SrTiO${}_3$ heterostructures
• Metallic interfaces in a CaTiO${}_3$/LaTiO${}_3$ heterostructure
• Anomalous Thermodynamic Properties of Electron Accumulation Layer in SrTiO${}_3$