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Observation of metallic electronic structure in a single-atomic-layer oxide

Author

Listed:
  • Byungmin Sohn

    (Institute for Basic Science
    Seoul National University)

  • Jeong Rae Kim

    (Institute for Basic Science
    Seoul National University)

  • Choong H. Kim

    (Institute for Basic Science
    Seoul National University)

  • Sangmin Lee

    (Seoul National University)

  • Sungsoo Hahn

    (Institute for Basic Science
    Seoul National University)

  • Younsik Kim

    (Institute for Basic Science
    Seoul National University)

  • Soonsang Huh

    (Institute for Basic Science
    Seoul National University)

  • Donghan Kim

    (Institute for Basic Science
    Seoul National University)

  • Youngdo Kim

    (Institute for Basic Science
    Seoul National University)

  • Wonshik Kyung

    (Institute for Basic Science
    Seoul National University)

  • Minsoo Kim

    (Institute for Basic Science
    Seoul National University)

  • Miyoung Kim

    (Seoul National University)

  • Tae Won Noh

    (Institute for Basic Science
    Seoul National University)

  • Changyoung Kim

    (Institute for Basic Science
    Seoul National University)

Abstract

Correlated electrons in transition metal oxides exhibit a variety of emergent phases. When transition metal oxides are confined to a single-atomic-layer thickness, experiments so far have shown that they usually lose diverse properties and become insulators. In an attempt to extend the range of electronic phases of the single-atomic-layer oxide, we search for a metallic phase in a monolayer-thick epitaxial SrRuO3 film. Combining atomic-scale epitaxy and angle-resolved photoemission measurements, we show that the monolayer SrRuO3 is a strongly correlated metal. Systematic investigation reveals that the interplay between dimensionality and electronic correlation makes the monolayer SrRuO3 an incoherent metal with orbital-selective correlation. Furthermore, the unique electronic phase of the monolayer SrRuO3 is found to be highly tunable, as charge modulation demonstrates an incoherent-to-coherent crossover of the two-dimensional metal. Our work emphasizes the potentially rich phases of single-atomic-layer oxides and provides a guide to the manipulation of their two-dimensional correlated electron systems.

Suggested Citation

  • Byungmin Sohn & Jeong Rae Kim & Choong H. Kim & Sangmin Lee & Sungsoo Hahn & Younsik Kim & Soonsang Huh & Donghan Kim & Youngdo Kim & Wonshik Kyung & Minsoo Kim & Miyoung Kim & Tae Won Noh & Changyoun, 2021. "Observation of metallic electronic structure in a single-atomic-layer oxide," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26444-z
    DOI: 10.1038/s41467-021-26444-z
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    References listed on IDEAS

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    Cited by:

    1. Yong Zhong & Cheng Peng & Haili Huang & Dandan Guan & Jinwoong Hwang & Kuan H. Hsu & Yi Hu & Chunjing Jia & Brian Moritz & Donghui Lu & Jun-Sik Lee & Jin-Feng Jia & Thomas P. Devereaux & Sung-Kwan Mo , 2023. "From Stoner to local moment magnetism in atomically thin Cr2Te3," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Eun Kyo Ko & Sungsoo Hahn & Changhee Sohn & Sangmin Lee & Seung-Sup B. Lee & Byungmin Sohn & Jeong Rae Kim & Jaeseok Son & Jeongkeun Song & Youngdo Kim & Donghan Kim & Miyoung Kim & Choong H. Kim & Ch, 2023. "Tuning orbital-selective phase transitions in a two-dimensional Hund’s correlated system," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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