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

M. Salluzzo; J.C. Cezar; N.B. Brookes; V. Bisogni; G.M. De Luca; C. Richter; S. Thiel; J. Mannhart; M. Huijben; A. Brinkman; G. Rijnders; G. Ghiringhelli

doi:10.1103/PhysRevLett.102.166804

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

M. Salluzzo^*, J.C. Cezar, N.B. Brookes, V. Bisogni, G.M. De Luca, C. Richter, S. Thiel, J. Mannhart, M. Huijben, A. Brinkman, G. Rijnders, G. Ghiringhelli

^*Corresponding author for this work

Inorganic Materials Science

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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 3dxy levels become the first available states for conducting electrons.

Original language	English
Article number	166804
Journal	Physical review letters
Volume	102
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.102.166804
Publication status	Published - 23 Apr 2009

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title = "Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface",

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 3dxy levels become the first available states for conducting electrons.",

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T1 - Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface

AU - Salluzzo, M.

AU - Cezar, J.C.

AU - Brookes, N.B.

AU - Bisogni, V.

AU - De Luca, G.M.

AU - Richter, C.

AU - Thiel, S.

AU - Mannhart, J.

AU - Huijben, M.

AU - Brinkman, A.

AU - Rijnders, G.

AU - Ghiringhelli, G.

PY - 2009/4/23

Y1 - 2009/4/23

N2 - 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 3dxy levels become the first available states for conducting electrons.

AB - 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 3dxy levels become the first available states for conducting electrons.

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JO - Physical review letters

JF - Physical review letters

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

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