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Title: Discovery of a magnetic conductive interface in PbZr 0.2Ti 0.8O 3 /SrTiO 3 heterostructures

Abstract

Here, 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, SrTiO 3 and PbZr 0.2Ti 0.8O 3. 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.

Authors:
ORCiD logo [1];  [2];  [3];  [3]; ORCiD logo [3];  [1];  [1];  [1];  [4];  [5]; ORCiD logo [6];  [3];  [7];  [8];  [6];  [5];  [4];  [3];  [3];  [9]
  1. Univ. of California, Irvine, CA (United States). Dept. of Chemical Engineering and Materials Science
  2. Nanjing Univ. (China). National Lab. of Solid State Microstructures and College of Engineering and Applied Sciences
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  4. National Chiao Tung Univ., HsinChu (Taiwan). Dept. of Materials Science and Engineering
  5. Arizona State Univ., Tempe, AZ (United States). Dept. of Physics
  6. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  7. Univ. of California, Irvine, CA (United States). Irvine Materials Research Inst.
  8. Xiangtan Univ., Xiangtan (China). School of Materials Science and Engineering
  9. Univ. of California, Irvine, CA (United States). Dept. of Chemical Engineering and Materials Science and Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1489407
Grant/Contract Number:  
SC0014430; SC0012670; FG02-05ER46237
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, Yi, Xie, Lin, Kim, Jeongwoo, Stern, Alex, Wang, Hui, Zhang, Kui, Yan, Xingxu, Li, Linze, Liu, Henry, Zhao, Gejian, Chi, Hang, Gadre, Chaitanya, Lin, Qiyin, Zhou, Yichun, Uher, Ctirad, Chen, Tingyong, Chu, Ying -Hao, Xia, Jing, Wu, Ruqian, and Pan, Xiaoqing. Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures. United States: N. p., 2018. Web. doi:10.1038/s41467-018-02914-9.
Zhang, Yi, Xie, Lin, Kim, Jeongwoo, Stern, Alex, Wang, Hui, Zhang, Kui, Yan, Xingxu, Li, Linze, Liu, Henry, Zhao, Gejian, Chi, Hang, Gadre, Chaitanya, Lin, Qiyin, Zhou, Yichun, Uher, Ctirad, Chen, Tingyong, Chu, Ying -Hao, Xia, Jing, Wu, Ruqian, & Pan, Xiaoqing. Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures. United States. doi:10.1038/s41467-018-02914-9.
Zhang, Yi, Xie, Lin, Kim, Jeongwoo, Stern, Alex, Wang, Hui, Zhang, Kui, Yan, Xingxu, Li, Linze, Liu, Henry, Zhao, Gejian, Chi, Hang, Gadre, Chaitanya, Lin, Qiyin, Zhou, Yichun, Uher, Ctirad, Chen, Tingyong, Chu, Ying -Hao, Xia, Jing, Wu, Ruqian, and Pan, Xiaoqing. Thu . "Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures". United States. doi:10.1038/s41467-018-02914-9. https://www.osti.gov/servlets/purl/1489407.
@article{osti_1489407,
title = {Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures},
author = {Zhang, Yi and Xie, Lin and Kim, Jeongwoo and Stern, Alex and Wang, Hui and Zhang, Kui and Yan, Xingxu and Li, Linze and Liu, Henry and Zhao, Gejian and Chi, Hang and Gadre, Chaitanya and Lin, Qiyin and Zhou, Yichun and Uher, Ctirad and Chen, Tingyong and Chu, Ying -Hao and Xia, Jing and Wu, Ruqian and Pan, Xiaoqing},
abstractNote = {Here, 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.},
doi = {10.1038/s41467-018-02914-9},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2018},
month = {Thu Feb 15 00:00:00 EST 2018}
}

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