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Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures.


ABSTRACT: Emergent physical properties often arise at interfaces of complex oxide heterostructures due to the interplay between various degrees of freedom, especially those with polar discontinuities. It is desirable to explore if these structures may generate pure and controllable spin currents, which are needed to attain unmatched performance and energy efficiency in the next-generation spintronic devices. Here we report the emergence of a spin-polarized two-dimensional electron gas (SP-2DEG) at the interface of two insulators, SrTiO3 and PbZr0.2Ti0.8O3. This SP-2DEG is strongly localized at the interfacial Ti atoms, due to the interplay between Coulomb interaction and band bending, and can be tuned by the ferroelectric polarization. Our findings open a door for engineering ferroelectric/insulator interfaces to create tunable ferroic orders for magnetoelectric device applications and provide opportunities for designing multiferroic materials in heterostructures.

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC5814552 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Discovery of a magnetic conductive interface in PbZr<sub>0.2</sub>Ti<sub>0.8</sub>O<sub>3</sub> /SrTiO<sub>3</sub> heterostructures.

Zhang Yi Y   Xie Lin L   Kim Jeongwoo J   Stern Alex A   Wang Hui H   Zhang Kui K   Yan Xingxu X   Li Linze L   Liu Henry H   Zhao Gejian G   Chi Hang H   Gadre Chaitanya C   Lin Qiyin Q   Zhou Yichun Y   Uher Ctirad C   Chen Tingyong T   Chu Ying-Hao YH   Xia Jing J   Wu Ruqian R   Pan Xiaoqing X  

Nature communications 20180215 1


Emergent physical properties often arise at interfaces of complex oxide heterostructures due to the interplay between various degrees of freedom, especially those with polar discontinuities. It is desirable to explore if these structures may generate pure and controllable spin currents, which are needed to attain unmatched performance and energy efficiency in the next-generation spintronic devices. Here we report the emergence of a spin-polarized two-dimensional electron gas (SP-2DEG) at the int  ...[more]

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