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Striping of orbital-order with charge-disorder in optimally doped manganites
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Chen, Wei-Tin, Wang, Chin-Wei, Cheng, Ching-Chia, Chuang, Yu-Chun, Simonov, Arkadiy, Bristowe, Nicholas C. and Senn, Mark S. (2021) Striping of orbital-order with charge-disorder in optimally doped manganites. Nature Communications, 12 (1). 6319. doi:10.1038/s41467-021-26625-w ISSN 2041-1723.
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WRAP-Striping-orbital-order-charge-disorder-optimally-doped-manganites-2021.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1502Kb) | Preview |
Official URL: https://doi.org/10.1038/s41467-021-26625-w
Abstract
The phase diagrams of LaMnO3 perovskites have been intensely studied due to the colossal magnetoresistance (CMR) exhibited by compositions around the 38th doping level. However, phase segregation between ferromagnetic (FM) metallic and antiferromagnetic (AFM) insulating states, which itself is believed to be responsible for the colossal change in resistance under applied magnetic field, has prevented an atomistic-level understanding of the orbital ordered (OO) state at this doping level. Here, through the detailed crystallographic analysis of the phase diagram of a prototype system (AMn3A′Mn4BO12), we show that the superposition of two distinct lattice modes gives rise to a striping of OO Jahn-Teller active Mn3+ and charge disordered (CD) Mn3.5+ layers in a 1:3 ratio. This superposition only gives a cancellation of the Jahn-Teller-like displacements at the critical doping level. This striping of CD Mn3.5+ with Mn3+ provides a natural mechanism though which long range OO can melt, giving way to a conducting state.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||||||||||||||||||||||||||||||
SWORD Depositor: | Library Publications Router | ||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Perovskite -- Magnetic properties, Magnetoresistance, Manganese oxides, Electronics -- Materials, Solid State Chemistry | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Nature Communications | ||||||||||||||||||||||||||||||||||||
Publisher: | Nature Publishing Group UK | ||||||||||||||||||||||||||||||||||||
ISSN: | 2041-1723 | ||||||||||||||||||||||||||||||||||||
Official Date: | 3 November 2021 | ||||||||||||||||||||||||||||||||||||
Dates: |
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Volume: | 12 | ||||||||||||||||||||||||||||||||||||
Number: | 1 | ||||||||||||||||||||||||||||||||||||
Article Number: | 6319 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1038/s41467-021-26625-w | ||||||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 6 December 2021 | ||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 6 December 2021 | ||||||||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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