Format

Send to

Choose Destination
Phys Rev Lett. 2009 Apr 24;102(16):166804. Epub 2009 Apr 23.

Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface.

Author information

1
CNR-INFM COHERENTIA, Complesso MonteSantangelo via Cinthia, 80126 Napoli, Italy. salluzzo@na.infn.it

Abstract

In 2004, Ohtomo and Hwang discovered that an electron gas is created at the interface between insulating LaAlO3 and SrTiO3 compounds. Here we show that the generation of a conducting electron gas is related to an orbital reconstruction occurring at the LaAlO3/SrTiO3 interface. Our results are based on extensive investigations of the electronic properties and of the orbital structure of the interface using x-ray absorption spectroscopy. In particular, we find that the degeneracy of the Ti 3d states is fully removed and that the Ti 3d xy levels become the first available states for conducting electrons.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center