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Visualization of a ferromagnetic metallic edge state in manganite strips

Author

Listed:
  • Kai Du

    (Fudan University)

  • Kai Zhang

    (Fudan University)

  • Shuai Dong

    (Southeast University)

  • Wengang Wei

    (Fudan University
    College of Physics Science and Information Engineering, Hebei Normal University)

  • Jian Shao

    (Fudan University)

  • Jiebin Niu

    (Fudan University
    Institute of Microelectronics, Chinese Academy of Sciences)

  • Jinjie Chen

    (Fudan University)

  • Yinyan Zhu

    (Fudan University)

  • Hanxuan Lin

    (Fudan University)

  • Xiaolu Yin

    (University of Nebraska Lincoln)

  • Sy-Hwang Liou

    (University of Nebraska Lincoln)

  • Lifeng Yin

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Jian Shen

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

Abstract

Recently, broken symmetry effect induced edge states in two-dimensional electronic systems have attracted great attention. However, whether edge states may exist in strongly correlated oxides is not yet known. In this work, using perovskite manganites as prototype systems, we demonstrate that edge states do exist in strongly correlated oxides. Distinct appearance of ferromagnetic metallic phase is observed along the edge of manganite strips by magnetic force microscopy. The edge states have strong influence on the transport properties of the strips, leading to higher metal–insulator transition temperatures and lower resistivity in narrower strips. Model calculations show that the edge states are associated with the broken symmetry effect of the antiferromagnetic charge-ordered states in manganites. Besides providing a new understanding of the broken symmetry effect in complex oxides, our discoveries indicate that novel edge state physics may exist in strongly correlated oxides beyond the current two-dimensional electronic systems.

Suggested Citation

  • Kai Du & Kai Zhang & Shuai Dong & Wengang Wei & Jian Shao & Jiebin Niu & Jinjie Chen & Yinyan Zhu & Hanxuan Lin & Xiaolu Yin & Sy-Hwang Liou & Lifeng Yin & Jian Shen, 2015. "Visualization of a ferromagnetic metallic edge state in manganite strips," Nature Communications, Nature, vol. 6(1), pages 1-5, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7179
    DOI: 10.1038/ncomms7179
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    Cited by:

    1. Qiang Li & Tian Miao & Huimin Zhang & Weiyan Lin & Wenhao He & Yang Zhong & Lifen Xiang & Lina Deng & Biying Ye & Qian Shi & Yinyan Zhu & Hangwen Guo & Wenbin Wang & Changlin Zheng & Lifeng Yin & Xiao, 2022. "Electronically phase separated nano-network in antiferromagnetic insulating LaMnO3/PrMnO3/CaMnO3 tricolor superlattice," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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