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Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

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Chen, Wei-Tin, Wang, Chin-Wei, Wu, Hung-Cheng, Chou, Fang-Cheng, Yang, Hung-Duen, Simonov, Arkadiy and Senn, Mark S. (2018) Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering. Physical Review B (Condensed Matter and Materials Physics), 97 (14). 144102 . doi:10.1103/PhysRevB.97.144102 ISSN 1098-0121.

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Official URL: http://dx.doi.org/10.1103/PhysRevB.97.144102

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Abstract

It is of great interest to design and make materials in which ferroelectric polarization is coupled to other order parameters such as lattice, magnetic, and electronic instabilities. Such materials will be invaluable in next-generation data storage devices. Recently, remarkable progress has been made in understanding improper ferroelectric coupling mechanisms that arise from lattice and magnetic instabilities. However, although theoretically predicted, a compact lattice coupling between electronic and ferroelectric (polar) instabilities has yet to be realized. Here we report detailed crystallographic studies of a perovskite Hg A Mn A ′ 3 Mn B 4 O 12 that is found to exhibit a polar ground state on account of such couplings that arise from charge and orbital ordering on both the A ′ - and B-sites, which are themselves driven by a highly unusual Mn A ′ -Mn B intersite charge transfer. The inherent coupling of polar, charge, orbital, and hence magnetic degrees of freedom make this a system of great fundamental interest, and demonstrating ferroelectric switching in this and a host of recently reported hybrid improper ferroelectrics remains a substantial challenge

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Library of Congress Subject Headings (LCSH): Ferroelectricity , Perovskite
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 1 April 2018
Dates:
DateEvent
1 April 2018Published
5 April 2018Available
5 April 2018Accepted
Volume: 97
Number: 14
Article Number: 144102
DOI: 10.1103/PhysRevB.97.144102
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 17 May 2018
Date of first compliant Open Access: 17 May 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
IE141335Royal Societyhttp://dx.doi.org/10.13039/501100000288
104-2911-I-002-535Ministry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
105-2911-I-002-515Ministry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
103-2112-M-002-022-MY3Ministry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
EE13284Diamond Light Sourcehttp://dx.doi.org/10.13039/100011889
mt13639 Diamond Light Sourcehttp://dx.doi.org/10.13039/100011889
mt15920Diamond Light Sourcehttp://dx.doi.org/10.13039/100011889
2016B0091 National Synchrotron Radiation Research Center (Taiwan)http://viaf.org/viaf/160080235
2017-1-127-1National Synchrotron Radiation Research Center (Taiwan)http://viaf.org/viaf/160080235
HC2331European Synchrotron Radiation Facilityhttp://dx.doi.org/10.13039/501100001671
P4864Australian Nuclear Science and Technology Organisationhttp://dx.doi.org/10.13039/100008206
MI5930Australian Nuclear Science and Technology Organisationhttp://dx.doi.org/10.13039/100008206
UNSPECIFIEDRoyal Commission for the Exhibition of 1851http://dx.doi.org/10.13039/501100000700
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288

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