Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation

D. Pesquera; M. Scigaj; P. Gargiani; A. Barla; J. Herrero-Martín; E. Pellegrin; S. M. Valvidares; J. Gázquez; M. Varela; N. Dix; J. Fontcuberta; F. Sánchez; G. Herranz

doi:10.1103/PhysRevLett.113.156802

Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation

D. Pesquera, M. Scigaj, P. Gargiani, A. Barla, J. Herrero-Martín, E. Pellegrin, S. M. Valvidares, J. Gázquez, M. Varela, N. Dix, J. Fontcuberta, F. Sánchez, G. Herranz

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

33 Citations (Scopus)

Abstract

© 2014 American Physical Society. Recent findings show the emergence of two-dimensional electron gases (2DEGs) at LaAlO3/SrTiO3 interfaces along different orientations; yet details on band reconstructions have remained so far unknown. Via x-ray linear dichroism spectroscopy, we demonstrate that crystal symmetry imposes distinctive 2DEG orbital hierarchies on (001)-and (110)-oriented quantum wells, allowing selective occupancy of states of different symmetry. Such orientational tuning expands the possibilities for electronic engineering of 2DEGs and opens up enticing opportunities to understand the link between orbital symmetry and complex correlated states at LaAlO3/SrTiO3 quantum wells.

Original language	English
Article number	156802
Journal	Physical Review Letters
Volume	113
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.113.156802
Publication status	Published - 7 Oct 2014

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Pesquera, D., Scigaj, M., Gargiani, P., Barla, A., Herrero-Martín, J., Pellegrin, E., Valvidares, S. M., Gázquez, J., Varela, M., Dix, N., Fontcuberta, J., Sánchez, F., & Herranz, G. (2014). Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation. Physical Review Letters, 113(15), [156802]. https://doi.org/10.1103/PhysRevLett.113.156802

Pesquera, D. ; Scigaj, M. ; Gargiani, P. ; Barla, A. ; Herrero-Martín, J. ; Pellegrin, E. ; Valvidares, S. M. ; Gázquez, J. ; Varela, M. ; Dix, N. ; Fontcuberta, J. ; Sánchez, F. ; Herranz, G. / Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation. In: Physical Review Letters. 2014 ; Vol. 113, No. 15.

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title = "Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation",

abstract = "{\textcopyright} 2014 American Physical Society. Recent findings show the emergence of two-dimensional electron gases (2DEGs) at LaAlO3/SrTiO3 interfaces along different orientations; yet details on band reconstructions have remained so far unknown. Via x-ray linear dichroism spectroscopy, we demonstrate that crystal symmetry imposes distinctive 2DEG orbital hierarchies on (001)-and (110)-oriented quantum wells, allowing selective occupancy of states of different symmetry. Such orientational tuning expands the possibilities for electronic engineering of 2DEGs and opens up enticing opportunities to understand the link between orbital symmetry and complex correlated states at LaAlO3/SrTiO3 quantum wells.",

author = "D. Pesquera and M. Scigaj and P. Gargiani and A. Barla and J. Herrero-Mart{\'i}n and E. Pellegrin and Valvidares, {S. M.} and J. G{\'a}zquez and M. Varela and N. Dix and J. Fontcuberta and F. S{\'a}nchez and G. Herranz",

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Pesquera, D, Scigaj, M, Gargiani, P, Barla, A, Herrero-Martín, J, Pellegrin, E, Valvidares, SM, Gázquez, J, Varela, M, Dix, N, Fontcuberta, J, Sánchez, F & Herranz, G 2014, 'Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation', Physical Review Letters, vol. 113, no. 15, 156802. https://doi.org/10.1103/PhysRevLett.113.156802

Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation. / Pesquera, D.; Scigaj, M.; Gargiani, P.; Barla, A.; Herrero-Martín, J.; Pellegrin, E.; Valvidares, S. M.; Gázquez, J.; Varela, M.; Dix, N.; Fontcuberta, J.; Sánchez, F.; Herranz, G.

In: Physical Review Letters, Vol. 113, No. 15, 156802, 07.10.2014.

Research output: Contribution to journal › Article › Research › peer-review

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T1 - Two-dimensional electron gases at LaAlO3/SrTiO3 interfaces: Orbital symmetry and hierarchy engineered by crystal orientation

AU - Pesquera, D.

AU - Scigaj, M.

AU - Gargiani, P.

AU - Barla, A.

AU - Herrero-Martín, J.

AU - Pellegrin, E.

AU - Valvidares, S. M.

AU - Gázquez, J.

AU - Varela, M.

AU - Dix, N.

AU - Fontcuberta, J.

AU - Sánchez, F.

AU - Herranz, G.

PY - 2014/10/7

Y1 - 2014/10/7

N2 - © 2014 American Physical Society. Recent findings show the emergence of two-dimensional electron gases (2DEGs) at LaAlO3/SrTiO3 interfaces along different orientations; yet details on band reconstructions have remained so far unknown. Via x-ray linear dichroism spectroscopy, we demonstrate that crystal symmetry imposes distinctive 2DEG orbital hierarchies on (001)-and (110)-oriented quantum wells, allowing selective occupancy of states of different symmetry. Such orientational tuning expands the possibilities for electronic engineering of 2DEGs and opens up enticing opportunities to understand the link between orbital symmetry and complex correlated states at LaAlO3/SrTiO3 quantum wells.

AB - © 2014 American Physical Society. Recent findings show the emergence of two-dimensional electron gases (2DEGs) at LaAlO3/SrTiO3 interfaces along different orientations; yet details on band reconstructions have remained so far unknown. Via x-ray linear dichroism spectroscopy, we demonstrate that crystal symmetry imposes distinctive 2DEG orbital hierarchies on (001)-and (110)-oriented quantum wells, allowing selective occupancy of states of different symmetry. Such orientational tuning expands the possibilities for electronic engineering of 2DEGs and opens up enticing opportunities to understand the link between orbital symmetry and complex correlated states at LaAlO3/SrTiO3 quantum wells.

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DO - 10.1103/PhysRevLett.113.156802

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