Proposal of a one-dimensional electron gas in the steps at the LaAlO${}_3$-SrTiO${}_3$ interface

Abstract

The two-dimensional electron gas (2DEG) at the interface between LaAlO${}_3$ (LAO) and SrTiO${}_3$ (STO) has become one of the most fascinating and highly-debated oxide systems of recent times. Here we propose that a one-dimensional electron gas (1DEG) can be engineered at the step edges of the LAO/STO interface. These predictions are supported by first principles calculations and electrostatic modeling which elucidate the origin of the 1DEG as an electronic reconstruction to compensate a net surface charge in the step edge. The results suggest a novel route to increasing the functional density in these electronic interfaces.

4 pages, 3 figures

References in corpus (6)

• Magnetic effects at the interface between nonmagnetic oxides
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Surface defects and conduction in polar oxide heterostructures
• Oxide superlattices with alternating p and n interfaces
• Electrostatic stability of insulating surfaces: Theory and applications
• The net charge at interfaces between insulators

Cited by in corpus (10)

• Locally enhanced conductivity due to the tetragonal domain structure in LaAlO${}_3$/SrTiO${}_3$ heterointerfaces
• Origin of two-dimensional electron gases at oxide interfaces: insights from theory
• Intrinsic instability of electronic interfaces with strong Rashba coupling
• Phase separation from electron confinement at oxide interfaces
• Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling
• Inhomogeneous multi-carrier superconductivity at LaXO3/SrTiO3 (X=Al or Ti) oxide interfaces
• Dissipation in a topological Josephson junction
• Anisotropic electronic transport of the two-dimensional electron system in Al2O3/SrTiO3 heterostructures
• Electronic Reconstruction Enhanced Tunneling Conductance at Terrace Edges of Ultrathin Oxide Films
• Influence of the vicinal substrate miscut on the anisotropic two-dimensional electronic transport in Al2O3-SrTiO3 heterostructures