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. Di Luca, G.M. De Luca, C. Richter, C. Richter, S. Thiel, J. Mannhart, Mark Huijben, Alexander Brinkman, Augustinus J.H.M. Rijnders, G. Ghiringhelli

Research output: Contribution to journalArticleAcademicpeer-review

223 Citations (Scopus)

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 languageUndefined
Pages (from-to)166804-
JournalPhysical review letters
Volume102
Issue number16
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-259190
  • IR-73731

Cite this

Salluzzo, M., Cezar, J. C., Brookes, N. B., Bisogni, V., Di Luca, G. M., De Luca, G. M., ... Ghiringhelli, G. (2009). Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. Physical review letters, 102(16), 166804-. https://doi.org/10.1103/PhysRevLett.102.166804
Salluzzo, M. ; Cezar, J.C. ; Brookes, N.B. ; Bisogni, V. ; Di Luca, G.M. ; De Luca, G.M. ; Richter, C. ; Richter, C. ; Thiel, S. ; Mannhart, J. ; Huijben, Mark ; Brinkman, Alexander ; Rijnders, Augustinus J.H.M. ; Ghiringhelli, G. / Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. In: Physical review letters. 2009 ; Vol. 102, No. 16. pp. 166804-.
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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",
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author = "M. Salluzzo and J.C. Cezar and N.B. Brookes and V. Bisogni and {Di Luca}, G.M. and {De Luca}, G.M. and C. Richter and C. Richter and S. Thiel and J. Mannhart and Mark Huijben and Alexander Brinkman and Rijnders, {Augustinus J.H.M.} and G. Ghiringhelli",
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Salluzzo, M, Cezar, JC, Brookes, NB, Bisogni, V, Di Luca, GM, De Luca, GM, Richter, C, Richter, C, Thiel, S, Mannhart, J, Huijben, M, Brinkman, A, Rijnders, AJHM & Ghiringhelli, G 2009, 'Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface', Physical review letters, vol. 102, no. 16, pp. 166804-. https://doi.org/10.1103/PhysRevLett.102.166804

Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. / Salluzzo, M.; Cezar, J.C.; Brookes, N.B.; Bisogni, V.; Di Luca, G.M.; De Luca, G.M.; Richter, C.; Richter, C.; Thiel, S.; Mannhart, J.; Huijben, Mark; Brinkman, Alexander; Rijnders, Augustinus J.H.M.; Ghiringhelli, G.

In: Physical review letters, Vol. 102, No. 16, 2009, p. 166804-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

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 - Di Luca, G.M.

AU - De Luca, G.M.

AU - Richter, C.

AU - Richter, C.

AU - Thiel, S.

AU - Mannhart, J.

AU - Huijben, Mark

AU - Brinkman, Alexander

AU - Rijnders, Augustinus J.H.M.

AU - Ghiringhelli, G.

PY - 2009

Y1 - 2009

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

KW - METIS-259190

KW - IR-73731

U2 - 10.1103/PhysRevLett.102.166804

DO - 10.1103/PhysRevLett.102.166804

M3 - Article

VL - 102

SP - 166804-

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

IS - 16

ER -