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

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

2011-11-26

arxiv.org/abs/1111.6165v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

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.

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