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NATURE COMMUNICATIONS, Volume: 9, Article Number: 685, FEB 15 2018

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

By:Zhang, Y (Zhang, Yi)[ 1 ] ; Xie, L (Xie, Lin)[ 2,3 ] ; Kim, J (Kim, Jeongwoo)[ 4 ] ; Stern, A (Stern, Alex)[ 4 ] ; Wang, H (Wang, Hui)[ 4 ] ; Zhang, K (Zhang, Kui)[ 1 ] ; Yan, XX (Yan, Xingxu)[ 1 ] ; Li, LZ (Li, Linze)[ 1 ] ; Liu, H (Liu, Henry)[ 5 ] ; Zhao, GJ (Zhao, Gejian)[ 6 ] ; Chi, H (Chi, Hang)[ 7 ] ; Gadre, C (Gadre, Chaitanya)[ 4 ] ; Lin, QY (Lin, Qiyin)[ 8 ] ; Zhou, YC (Zhou, Yichun)[ 9 ] ; Uher, C (Uher, Ctirad)[ 7 ] ; Chen, TY (Chen, Tingyong)[ 6 ] ; Chu, YH (Chu, Ying-Hao)[ 5 ] ; Xia, J (Xia, Jing)[ 4 ] ; Wu, RQ (Wu, Ruqian)[ 4 ] ; Pan, XQ (Pan, Xiaoqing)[ 1,4 ]

NATURE COMMUNICATIONS, Volume: 9, Article Number: 685, DOI: 10.1038/s41467-018-02914-9, Published: FEB 15 2018, Document Type:Article

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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 dis-continuities. 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.

Keywords

KeyWords Plus:AUGMENTED-WAVE METHODLAALO3/SRTIO3 INTERFACEOXIDE HETEROSTRUCTURESROOM-TEMPERATUREELECTRON-GASSUPERCONDUCTIVITYFERROMAGNETISMPOLARIZATIONFERROELECTRICITYSUPERLATTICES

Author Information

Reprint Address: Pan, XQ (reprint author)


Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA.

Reprint Address: Pan, XQ (reprint author)


Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.

 

Addresses:


[ 1 ] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA


[ 2 ] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China


[ 3 ] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China


[ 4 ] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA


[ 5 ] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan


[ 6 ] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA


[ 7 ] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA


[ 8 ] Univ Calif Irvine, Irvine Mat Res Inst, Irvine, CA 92697 USA


[ 9 ] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China

 

E-mail Addresses:xiaoqing.pan@uci.edu

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