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

Journal Article · Mon Nov 02 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4935214· OSTI ID:22486007

Peng, J. J.; Cui, B.; Li, F.; Mao, H. J.; Wang, G. Y.

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.

• OSTI ID: 22486007
• Journal Information: Applied Physics Letters, Vol. 107, Issue 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFINEMENT
CONTROL
COVALENCE
EPITAXY
FERROELECTRIC MATERIALS
INTERFACES
MODULATION
OXIDES
POLARIZATION
STRAINS
TITANATES
TITANIUM IONS