Visualization of a ferromagnetic metallic edge state in manganite strips

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 () and Jian Shen ()
Additional contact information
Kai Du: Fudan University
Kai Zhang: Fudan University
Shuai Dong: Southeast University
Wengang Wei: Fudan University
Jian Shao: Fudan University
Jiebin Niu: Fudan University
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
Jian Shen: Fudan University

Nature Communications, 2015, vol. 6, issue 1, 1-5

Abstract: 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.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7179

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DOI: 10.1038/ncomms7179

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