Proposal of a one-dimensional electron gas in the steps at the LaAlO <inf>3</inf>-SrTiO <inf>3</inf> interface
Physical Review Letters
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Bristowe, N., Fix, T., Blamire, M., Littlewood, P., & Artacho, E. (2012). Proposal of a one-dimensional electron gas in the steps at the LaAlO <inf>3</inf>-SrTiO <inf>3</inf> interface. Physical Review Letters, 108 (16)https://doi.org/10.1103/PhysRevLett.108.166802
The two-dimensional electron gas at the interface between LaAlO 3 and SrTiO 3 has become one of the most fascinating and highly debated oxide systems of recent times. Here we propose that a one-dimensional electron gas can be engineered at the step edges of the LaAlO 3 /SrTiO 3 interface. These predictions are supported by first-principles calculations and electrostatic modeling which elucidate the origin of the one-dimensional electron gas 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.
We acknowledge M. Stengel for helpful comments, the support of EPSRC, and computing resources of CamGRID and Darwin at Cambridge, the Spanish Supercomputer Network, and HPC Europa. P. B. L. acknowledges DOE support under FWP 70069.
External DOI: https://doi.org/10.1103/PhysRevLett.108.166802
This record's URL: https://www.repository.cam.ac.uk/handle/1810/266176