Long-range electronic reconstruction to a dxz,yz-dominated Fermi surface below the LaAlO3/SrTiO3 interface
Abstract
Low dimensionality, broken symmetry and easily-modulated carrier concentrations provoke novel electronic phase emergence at oxide interfaces. However, the spatial extent of such reconstructions - i.e. the interfacial “depth” - remains unclear. Examining LaAlO3/SrTiO3 heterostructures at previously unexplored carrier densities $$n_{2D}$$ ≥ 6.9 × 1014 cm–2, we observe a Shubnikov-de Haas effect for small in-plane fields, characteristic of an anisotropic 3D Fermi surface with preferential dxz,yz orbital occupancy extending over at least 100 nm perpendicular to the interface. Quantum oscillations from the 3D Fermi surface of bulk doped SrTiO3 emerge simultaneously at higher $$n_{2D}$$. We distinguish three areas in doped perovskite heterostructures: narrow (<20 nm) 2D interfaces housing superconductivity and/or other emergent phases, electronically isotropic regions far (>120 nm) from the interface and new intermediate zones where interfacial proximity renormalises the electronic structure relative to the bulk.
- Authors:
-
- Nanyang Technological Univ. (Singapore)
- Univ. of Nebraska, Lincoln, NE (United States)
- Nanyang Technological Univ. (Singapore); Univ. of Cambridge (United Kingdom). Cavendish Lab.
- Toshiba Research Europe Ltd., Cambridge (United Kingdom). Cambridge Research Lab.
- Univ. of Cambridge (United Kingdom). Cavendish Lab.
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1624721
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Electronic properties and materials; Surfaces, interfaces and thin films
Citation Formats
Petrović, A. P., Paré, A., Paudel, T. R., Lee, K., Holmes, S., Barnes, C. H. W., David, A., Wu, T., Tsymbal, E. Y., and Panagopoulos, C. Long-range electronic reconstruction to a dxz,yz-dominated Fermi surface below the LaAlO3/SrTiO3 interface. United States: N. p., 2014.
Web. doi:10.1038/srep05338.
Petrović, A. P., Paré, A., Paudel, T. R., Lee, K., Holmes, S., Barnes, C. H. W., David, A., Wu, T., Tsymbal, E. Y., & Panagopoulos, C. Long-range electronic reconstruction to a dxz,yz-dominated Fermi surface below the LaAlO3/SrTiO3 interface. United States. https://doi.org/10.1038/srep05338
Petrović, A. P., Paré, A., Paudel, T. R., Lee, K., Holmes, S., Barnes, C. H. W., David, A., Wu, T., Tsymbal, E. Y., and Panagopoulos, C. Wed .
"Long-range electronic reconstruction to a dxz,yz-dominated Fermi surface below the LaAlO3/SrTiO3 interface". United States. https://doi.org/10.1038/srep05338. https://www.osti.gov/servlets/purl/1624721.
@article{osti_1624721,
title = {Long-range electronic reconstruction to a dxz,yz-dominated Fermi surface below the LaAlO3/SrTiO3 interface},
author = {Petrović, A. P. and Paré, A. and Paudel, T. R. and Lee, K. and Holmes, S. and Barnes, C. H. W. and David, A. and Wu, T. and Tsymbal, E. Y. and Panagopoulos, C.},
abstractNote = {Low dimensionality, broken symmetry and easily-modulated carrier concentrations provoke novel electronic phase emergence at oxide interfaces. However, the spatial extent of such reconstructions - i.e. the interfacial “depth” - remains unclear. Examining LaAlO3/SrTiO3 heterostructures at previously unexplored carrier densities $n_{2D}$ ≥ 6.9 × 1014 cm–2, we observe a Shubnikov-de Haas effect for small in-plane fields, characteristic of an anisotropic 3D Fermi surface with preferential dxz,yz orbital occupancy extending over at least 100 nm perpendicular to the interface. Quantum oscillations from the 3D Fermi surface of bulk doped SrTiO3 emerge simultaneously at higher $n_{2D}$. We distinguish three areas in doped perovskite heterostructures: narrow (<20 nm) 2D interfaces housing superconductivity and/or other emergent phases, electronically isotropic regions far (>120 nm) from the interface and new intermediate zones where interfacial proximity renormalises the electronic structure relative to the bulk.},
doi = {10.1038/srep05338},
journal = {Scientific Reports},
number = 1,
volume = 4,
place = {United States},
year = {Wed Jun 18 00:00:00 EDT 2014},
month = {Wed Jun 18 00:00:00 EDT 2014}
}
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Works referencing / citing this record:
Kondo effect with tunable spin–orbit interaction in LaTiO 3 /CeTiO 3 /SrTiO 3 heterostructure
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