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; Jian Shen

doi:10.1038/ncomms7179

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, Jian Shen

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

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.

Original language	English (US)
Article number	6179
Journal	Nature communications
Volume	6
DOIs	https://doi.org/10.1038/ncomms7179
State	Published - Feb 4 2015

ASJC Scopus subject areas

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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title = "Visualization of a ferromagnetic metallic edge state in manganite strips",

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.",

author = "Kai Du and Kai Zhang and Shuai Dong and Wengang Wei and Jian Shao and Jiebin Niu and Jinjie Chen and Yinyan Zhu and Hanxuan Lin and Xiaolu Yin and Liou, {Sy Hwang} and Lifeng Yin and Jian Shen",

note = "Funding Information: We would like to thank E. Dagotto for valuable discussions. This work was supported by the National Basic Research Program of China (973 Program) under the grant nos. 2011CB921800, 2013CB932901, 2014CB921104 and 2011CB922101; National Natural Science Foundation of China (91121002, 11274071, 51322206 and 11274060); Shanghai Municipal Natural Science Foundation (14JC1400500) and National Science Foundation of the United States-Materials Research Science and Engineering Centers program (DMR-0820521). Publisher Copyright: {\textcopyright} 2015 Macmillan Publishers Limited. All rights reserved.",

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doi = "10.1038/ncomms7179",

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AU - Du, Kai

AU - Zhang, Kai

AU - Dong, Shuai

AU - Wei, Wengang

AU - Shao, Jian

AU - Niu, Jiebin

AU - Chen, Jinjie

AU - Zhu, Yinyan

AU - Lin, Hanxuan

AU - Yin, Xiaolu

AU - Liou, Sy Hwang

AU - Yin, Lifeng

AU - Shen, Jian

N1 - Funding Information: We would like to thank E. Dagotto for valuable discussions. This work was supported by the National Basic Research Program of China (973 Program) under the grant nos. 2011CB921800, 2013CB932901, 2014CB921104 and 2011CB922101; National Natural Science Foundation of China (91121002, 11274071, 51322206 and 11274060); Shanghai Municipal Natural Science Foundation (14JC1400500) and National Science Foundation of the United States-Materials Research Science and Engineering Centers program (DMR-0820521). Publisher Copyright: © 2015 Macmillan Publishers Limited. All rights reserved.

PY - 2015/2/4

Y1 - 2015/2/4

N2 - 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.

AB - 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.

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Visualization of a ferromagnetic metallic edge state in manganite strips

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