Field-effect control of superconductivity and Rashba spin-orbit coupling in top-gated LaAlO3/SrTiO3 devices
10.1038/srep12751
Crossref journal-article
Springer Science and Business Media LLC
Scientific Reports (297)
Abstract

AbstractThe recent development in the fabrication of artificial oxide heterostructures opens new avenues in the field of quantum materials by enabling the manipulation of the charge, spin and orbital degrees of freedom. In this context, the discovery of two-dimensional electron gases (2-DEGs) at LaAlO3/SrTiO3 interfaces, which exhibit both superconductivity and strong Rashba spin-orbit coupling (SOC), represents a major breakthrough. Here, we report on the realisation of a field-effect LaAlO3/SrTiO3 device, whose physical properties, including superconductivity and SOC, can be tuned over a wide range by a top-gate voltage. We derive a phase diagram, which emphasises a field-effect-induced superconductor-to-insulator quantum phase transition. Magneto-transport measurements show that the Rashba coupling constant increases linearly with the interfacial electric field. Our results pave the way for the realisation of mesoscopic devices, where these two properties can be manipulated on a local scale by means of top-gates.

Bibliography

Hurand, S., Jouan, A., Feuillet-Palma, C., Singh, G., Biscaras, J., Lesne, E., Reyren, N., Barthélémy, A., Bibes, M., Villegas, J. E., Ulysse, C., Lafosse, X., Pannetier-Lecoeur, M., Caprara, S., Grilli, M., Lesueur, J., & Bergeal, N. (2015). Field-effect control of superconductivity and Rashba spin-orbit coupling in top-gated LaAlO3/SrTiO3 devices. Scientific Reports, 5(1).

Authors 17
  1. S. Hurand (first)
  2. A. Jouan (additional)
  3. C. Feuillet-Palma (additional)
  4. G. Singh (additional)
  5. J. Biscaras (additional)
  6. E. Lesne (additional)
  7. N. Reyren (additional)
  8. A. Barthélémy (additional)
  9. M. Bibes (additional)
  10. J. E. Villegas (additional)
  11. C. Ulysse (additional)
  12. X. Lafosse (additional)
  13. M. Pannetier-Lecoeur (additional)
  14. S. Caprara (additional)
  15. M. Grilli (additional)
  16. J. Lesueur (additional)
  17. N. Bergeal (additional)
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Dates
Type When
Created 10 years ago (Aug. 5, 2015, 8:55 a.m.)
Deposited 2 years, 7 months ago (Jan. 5, 2023, 4:59 p.m.)
Indexed 1 week, 4 days ago (Aug. 23, 2025, 9:30 p.m.)
Issued 10 years ago (Aug. 5, 2015)
Published 10 years ago (Aug. 5, 2015)
Published Online 10 years ago (Aug. 5, 2015)
Funders 0

None

@article{Hurand_2015, title={Field-effect control of superconductivity and Rashba spin-orbit coupling in top-gated LaAlO3/SrTiO3 devices}, volume={5}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/srep12751}, DOI={10.1038/srep12751}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Hurand, S. and Jouan, A. and Feuillet-Palma, C. and Singh, G. and Biscaras, J. and Lesne, E. and Reyren, N. and Barthélémy, A. and Bibes, M. and Villegas, J. E. and Ulysse, C. and Lafosse, X. and Pannetier-Lecoeur, M. and Caprara, S. and Grilli, M. and Lesueur, J. and Bergeal, N.}, year={2015}, month=aug }