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Title: Anomalously deep polarization in SrTiO3 (001) interfaced with an epitaxial ultrathin manganite film

Using atomically-resolved imaging and spectroscopy, we reveal a remarkably deep polarization in non-ferroelectric SrTiO 3 near its interface with an ultrathin nonmetallic film of La 2/3Sr 1/3MnO 3. Electron holography shows an electric field near the interface in SrTiO 3, yielding a surprising spontaneous polarization density of ~ 21 μC/cm 2. Combining the experimental results with first principles calculations, we propose that the observed deep polarization is induced by the electric field originating from oxygen vacancies that extend beyond a dozen unit-cells from the interface, thus providing important evidence of the role of defects in the emergent interface properties of transition metal oxides.
Authors:
 [1] ;  [2] ; ;  [3] ;  [3] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [2]
  1. Louisiana State Univ., Baton Rouge, LA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
Report Number(s):
BNL-113356-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: MA015MACA; KC0201010; TRN: US1701372
Grant/Contract Number:
SC00112704; DOE DE-SC0002136; DESC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 15; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1341639
Alternate Identifier(s):
OSTI ID: 1329100

Wang, Zhen, Tao, Jing, Yu, Liping, Guo, Hangwen, Chen, Lina, Han, Myung-Geun, Wu, Lijun, Xin, Huolin, Kisslinger, Kim, Plummer, E. W., Zhang, Jiandi, and Zhu, Yimei. Anomalously deep polarization in SrTiO3 (001) interfaced with an epitaxial ultrathin manganite film. United States: N. p., Web. doi:10.1103/PhysRevB.94.155307.
Wang, Zhen, Tao, Jing, Yu, Liping, Guo, Hangwen, Chen, Lina, Han, Myung-Geun, Wu, Lijun, Xin, Huolin, Kisslinger, Kim, Plummer, E. W., Zhang, Jiandi, & Zhu, Yimei. Anomalously deep polarization in SrTiO3 (001) interfaced with an epitaxial ultrathin manganite film. United States. doi:10.1103/PhysRevB.94.155307.
Wang, Zhen, Tao, Jing, Yu, Liping, Guo, Hangwen, Chen, Lina, Han, Myung-Geun, Wu, Lijun, Xin, Huolin, Kisslinger, Kim, Plummer, E. W., Zhang, Jiandi, and Zhu, Yimei. 2016. "Anomalously deep polarization in SrTiO3 (001) interfaced with an epitaxial ultrathin manganite film". United States. doi:10.1103/PhysRevB.94.155307. https://www.osti.gov/servlets/purl/1341639.
@article{osti_1341639,
title = {Anomalously deep polarization in SrTiO3 (001) interfaced with an epitaxial ultrathin manganite film},
author = {Wang, Zhen and Tao, Jing and Yu, Liping and Guo, Hangwen and Chen, Lina and Han, Myung-Geun and Wu, Lijun and Xin, Huolin and Kisslinger, Kim and Plummer, E. W. and Zhang, Jiandi and Zhu, Yimei},
abstractNote = {Using atomically-resolved imaging and spectroscopy, we reveal a remarkably deep polarization in non-ferroelectric SrTiO3 near its interface with an ultrathin nonmetallic film of La2/3Sr1/3MnO3. Electron holography shows an electric field near the interface in SrTiO3, yielding a surprising spontaneous polarization density of ~ 21 μC/cm2. Combining the experimental results with first principles calculations, we propose that the observed deep polarization is induced by the electric field originating from oxygen vacancies that extend beyond a dozen unit-cells from the interface, thus providing important evidence of the role of defects in the emergent interface properties of transition metal oxides.},
doi = {10.1103/PhysRevB.94.155307},
journal = {Physical Review B},
number = 15,
volume = 94,
place = {United States},
year = {2016},
month = {10}
}

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