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Strong correlations elucidate the electronic structure and phase diagram of LaAlO3/SrTiO3 interface

Author

Listed:
  • E. Maniv

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • M. Ben Shalom

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • A. Ron

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • M. Mograbi

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • A. Palevski

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • M. Goldstein

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

  • Y. Dagan

    (Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University)

Abstract

The interface between the two band insulators SrTiO3 and LaAlO3 has the unexpected properties of a two-dimensional electron gas. It is even superconducting with a transition temperature, Tc, that can be tuned using gate bias Vg, which controls the number of electrons added or removed from the interface. The gate bias–temperature (Vg, T) phase diagram is characterized by a dome-shaped region where superconductivity occurs, that is, Tc has a non-monotonic dependence on Vg, similar to many unconventional superconductors. Here, we report, the frequency of the quantum resistance-oscillations versus inverse magnetic field for various Vg. This frequency follows the same non-monotonic behaviour as Tc; a similar trend is seen in the low field limit of the Hall coefficient. We theoretically show that electronic correlations result in a non-monotonic population of the mobile band, which can account for the experimental behaviour of the normal transport properties and the superconducting dome.

Suggested Citation

  • E. Maniv & M. Ben Shalom & A. Ron & M. Mograbi & A. Palevski & M. Goldstein & Y. Dagan, 2015. "Strong correlations elucidate the electronic structure and phase diagram of LaAlO3/SrTiO3 interface," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9239
    DOI: 10.1038/ncomms9239
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    Cited by:

    1. Xu Zhang & Tongshuai Zhu & Shuai Zhang & Zhongqiang Chen & Anke Song & Chong Zhang & Rongzheng Gao & Wei Niu & Yequan Chen & Fucong Fei & Yilin Tai & Guoan Li & Binghui Ge & Wenkai Lou & Jie Shen & Ha, 2024. "Light-induced giant enhancement of nonreciprocal transport at KTaO3-based interfaces," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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