Uniaxial Strain-Controlled Ground States in Manganite Films

Feng Jin; Mingqiang Gu; Chao Ma; Er Jia Guo; Jin Zhu; Lili Qu; Zixun Zhang; Kexuan Zhang; Liqiang Xu; Binbin Chen; Feng Chen; Guanyin Gao; James M. Rondinelli; Wenbin Wu

doi:10.1021/acs.nanolett.9b04506

Uniaxial Strain-Controlled Ground States in Manganite Films

Feng Jin^*, Mingqiang Gu, Chao Ma, Er Jia Guo, Jin Zhu, Lili Qu, Zixun Zhang, Kexuan Zhang, Liqiang Xu, Binbin Chen, Feng Chen, Guanyin Gao, James M. Rondinelli, Wenbin Wu

^*Corresponding author for this work

Materials Science and Engineering

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

25 Scopus citations

Abstract

Strongly correlated perovskite oxides exhibit a plethera of intriguing phenomena and stimulate a great potential for multifunctional device applications. Utilizing tunable uniaxial strain, rather than biaxial or anisotropic strain, delivered from the crystallography of a single crystal substrate to modify the ground state of strongly correlated perovskite oxides has rarely been addressed for phase-space control. Here, we show that the physical properties of La_2/3Ca_1/3MnO₃ (LCMO) films are remarkably different depending on the crystallographic orientations of the orthorhombic NdGaO₃ (NGO) substrates. More importantly, the antiferromagnetic charge-ordered insulating (COI) phase induced in the (100) or (001)-oriented LCMO films can be dramatically promoted (or suppressed) by a uniaxial tensile (or compressive) bending stress along the in-plane [010] direction. By contrast, the COI phase is nearly unaffected along the other transverse in-plane directions. Results from scanning transmission electron microscopy reveal that the (100)-or (001)-oriented LCMO films are uniaxially tensile strained along the [010] direction, while the LCMO/NGO(010) and LCMO/NGO(110) films remaining as a bulklike ferromagnetic metallic state exhibit a different strain state. Density functional theory calculations further reveal that the cooperatively increased Jahn-Teller distortion and charge ordering may be indispensible for the inducing and promoting of the COI phase. These findings provide a path to understand the correlation between local and extended structural distortions imparted by coherent epitaxy and the electronic states for quantum phase engineering.

Original language	English (US)
Pages (from-to)	1131-1140
Number of pages	10
Journal	Nano letters
Volume	20
Issue number	2
DOIs	https://doi.org/10.1021/acs.nanolett.9b04506
State	Published - Feb 12 2020

Funding

This work is supported by the National Basic Research Program of China (Grants 2016YFA0401003 and 2017YFA0403502), the National Natural Science Foundation of China (Grants 11974326, 11804342, 51872278, and 11574281), Hefei Science Center of Chinese Academy of Sciences (Grant 2018ZYFX002), China Postdoctoral Science Foundation (2018M632557), and Anhui Province Key Laboratory of Condensed Matter Physics at Extreme conditions. E.J.G. was supported by Hundred Talent Program from Chinese Academy of Sciences. M.G. and J.M.R. were supported by the U.S. Department of Energy (DOE) under Grant DE-SC0012375. DFT calculations were performed on the CARBON cluster at the Center for Nanoscale Materials and the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by the National Science Foundation (ACI-1548562). Use of the Center for Nanoscale Materials, an Office of Science user facility, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. In addition, a portion of this work was performed on the Steady High Magnetic Field Facility, the High Magnetic Field Laboratory, Chinese Academy of Sciences.

Keywords

density functional theory calculations
manganite thin films
phase separation
scanning transmission electron microscopy
uniaxial strain engineering

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Bioengineering
General Chemistry
General Materials Science

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10.1021/acs.nanolett.9b04506

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title = "Uniaxial Strain-Controlled Ground States in Manganite Films",

abstract = "Strongly correlated perovskite oxides exhibit a plethera of intriguing phenomena and stimulate a great potential for multifunctional device applications. Utilizing tunable uniaxial strain, rather than biaxial or anisotropic strain, delivered from the crystallography of a single crystal substrate to modify the ground state of strongly correlated perovskite oxides has rarely been addressed for phase-space control. Here, we show that the physical properties of La2/3Ca1/3MnO3 (LCMO) films are remarkably different depending on the crystallographic orientations of the orthorhombic NdGaO3 (NGO) substrates. More importantly, the antiferromagnetic charge-ordered insulating (COI) phase induced in the (100) or (001)-oriented LCMO films can be dramatically promoted (or suppressed) by a uniaxial tensile (or compressive) bending stress along the in-plane [010] direction. By contrast, the COI phase is nearly unaffected along the other transverse in-plane directions. Results from scanning transmission electron microscopy reveal that the (100)-or (001)-oriented LCMO films are uniaxially tensile strained along the [010] direction, while the LCMO/NGO(010) and LCMO/NGO(110) films remaining as a bulklike ferromagnetic metallic state exhibit a different strain state. Density functional theory calculations further reveal that the cooperatively increased Jahn-Teller distortion and charge ordering may be indispensible for the inducing and promoting of the COI phase. These findings provide a path to understand the correlation between local and extended structural distortions imparted by coherent epitaxy and the electronic states for quantum phase engineering.",

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author = "Feng Jin and Mingqiang Gu and Chao Ma and Guo, {Er Jia} and Jin Zhu and Lili Qu and Zixun Zhang and Kexuan Zhang and Liqiang Xu and Binbin Chen and Feng Chen and Guanyin Gao and Rondinelli, {James M.} and Wenbin Wu",

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T1 - Uniaxial Strain-Controlled Ground States in Manganite Films

AU - Jin, Feng

AU - Gu, Mingqiang

AU - Ma, Chao

AU - Guo, Er Jia

AU - Zhu, Jin

AU - Qu, Lili

AU - Zhang, Zixun

AU - Zhang, Kexuan

AU - Xu, Liqiang

AU - Chen, Binbin

AU - Chen, Feng

AU - Gao, Guanyin

AU - Rondinelli, James M.

AU - Wu, Wenbin

PY - 2020/2/12

Y1 - 2020/2/12

N2 - Strongly correlated perovskite oxides exhibit a plethera of intriguing phenomena and stimulate a great potential for multifunctional device applications. Utilizing tunable uniaxial strain, rather than biaxial or anisotropic strain, delivered from the crystallography of a single crystal substrate to modify the ground state of strongly correlated perovskite oxides has rarely been addressed for phase-space control. Here, we show that the physical properties of La2/3Ca1/3MnO3 (LCMO) films are remarkably different depending on the crystallographic orientations of the orthorhombic NdGaO3 (NGO) substrates. More importantly, the antiferromagnetic charge-ordered insulating (COI) phase induced in the (100) or (001)-oriented LCMO films can be dramatically promoted (or suppressed) by a uniaxial tensile (or compressive) bending stress along the in-plane [010] direction. By contrast, the COI phase is nearly unaffected along the other transverse in-plane directions. Results from scanning transmission electron microscopy reveal that the (100)-or (001)-oriented LCMO films are uniaxially tensile strained along the [010] direction, while the LCMO/NGO(010) and LCMO/NGO(110) films remaining as a bulklike ferromagnetic metallic state exhibit a different strain state. Density functional theory calculations further reveal that the cooperatively increased Jahn-Teller distortion and charge ordering may be indispensible for the inducing and promoting of the COI phase. These findings provide a path to understand the correlation between local and extended structural distortions imparted by coherent epitaxy and the electronic states for quantum phase engineering.

AB - Strongly correlated perovskite oxides exhibit a plethera of intriguing phenomena and stimulate a great potential for multifunctional device applications. Utilizing tunable uniaxial strain, rather than biaxial or anisotropic strain, delivered from the crystallography of a single crystal substrate to modify the ground state of strongly correlated perovskite oxides has rarely been addressed for phase-space control. Here, we show that the physical properties of La2/3Ca1/3MnO3 (LCMO) films are remarkably different depending on the crystallographic orientations of the orthorhombic NdGaO3 (NGO) substrates. More importantly, the antiferromagnetic charge-ordered insulating (COI) phase induced in the (100) or (001)-oriented LCMO films can be dramatically promoted (or suppressed) by a uniaxial tensile (or compressive) bending stress along the in-plane [010] direction. By contrast, the COI phase is nearly unaffected along the other transverse in-plane directions. Results from scanning transmission electron microscopy reveal that the (100)-or (001)-oriented LCMO films are uniaxially tensile strained along the [010] direction, while the LCMO/NGO(010) and LCMO/NGO(110) films remaining as a bulklike ferromagnetic metallic state exhibit a different strain state. Density functional theory calculations further reveal that the cooperatively increased Jahn-Teller distortion and charge ordering may be indispensible for the inducing and promoting of the COI phase. These findings provide a path to understand the correlation between local and extended structural distortions imparted by coherent epitaxy and the electronic states for quantum phase engineering.

KW - density functional theory calculations

KW - manganite thin films

KW - phase separation

KW - scanning transmission electron microscopy

KW - uniaxial strain engineering

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JO - Nano letters

JF - Nano letters

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Uniaxial Strain-Controlled Ground States in Manganite Films

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Keywords

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