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Title: Manipulation of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures

Abstract

We investigate the control of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures. It is achieved by the ferroelectric displacement of Ti ions polarized downward (upward) to form (break) Ni–O–Ti covalent bonding at the interface, accompanied by charge transfer between them and the modulation of the conductivity of ultrathin LaNiO{sub 3}. This electrically switchable and bi-direction control of orbital polarization in LaNiO{sub 3} is up to 25%, different from the manipulation by epitaxial strain or quantum confinement. Our finding opens a window for electrical control of orbital polarization at an oxide interface.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22486007
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFINEMENT; CONTROL; COVALENCE; EPITAXY; FERROELECTRIC MATERIALS; INTERFACES; MODULATION; OXIDES; POLARIZATION; STRAINS; TITANATES; TITANIUM IONS

Citation Formats

Peng, J. J., Song, C., E-mail: songcheng@mail.tsinghua.edu.cn, Cui, B., Li, F., Mao, H. J., Wang, G. Y., and Pan, F., E-mail: panf@mail.tsinghua.edu.cn. Manipulation of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures. United States: N. p., 2015. Web. doi:10.1063/1.4935214.
Peng, J. J., Song, C., E-mail: songcheng@mail.tsinghua.edu.cn, Cui, B., Li, F., Mao, H. J., Wang, G. Y., & Pan, F., E-mail: panf@mail.tsinghua.edu.cn. Manipulation of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures. United States. doi:10.1063/1.4935214.
Peng, J. J., Song, C., E-mail: songcheng@mail.tsinghua.edu.cn, Cui, B., Li, F., Mao, H. J., Wang, G. Y., and Pan, F., E-mail: panf@mail.tsinghua.edu.cn. Mon . "Manipulation of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures". United States. doi:10.1063/1.4935214.
@article{osti_22486007,
title = {Manipulation of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures},
author = {Peng, J. J. and Song, C., E-mail: songcheng@mail.tsinghua.edu.cn and Cui, B. and Li, F. and Mao, H. J. and Wang, G. Y. and Pan, F., E-mail: panf@mail.tsinghua.edu.cn},
abstractNote = {We investigate the control of orbital occupancy by ferroelectric polarization in LaNiO{sub 3}/BaTiO{sub 3−δ} heterostructures. It is achieved by the ferroelectric displacement of Ti ions polarized downward (upward) to form (break) Ni–O–Ti covalent bonding at the interface, accompanied by charge transfer between them and the modulation of the conductivity of ultrathin LaNiO{sub 3}. This electrically switchable and bi-direction control of orbital polarization in LaNiO{sub 3} is up to 25%, different from the manipulation by epitaxial strain or quantum confinement. Our finding opens a window for electrical control of orbital polarization at an oxide interface.},
doi = {10.1063/1.4935214},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 107,
place = {United States},
year = {2015},
month = {11}
}