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Title: Interface-induced magnetic polar metal phase in complex oxides

Abstract

Polar metals are commonly defined as metals with polar structural distortions. Strict symmetry restrictions make them an extremely rare breed as the structural constraints favor insulating over metallic phase. Moreover, no polar metals are known to be magnetic. Here we report on the realization of a magnetic polar metal phase in a BaTiO 3/SrRuO 3/BaTiO 3 heterostructure. Electron microscopy reveals polar lattice distortions in three-unit-cells thick SrRuO 3 between BaTiO 3 layers. Electrical transport and magnetization measurements reveal that this heterostructure possesses a metallic phase with high conductivity and ferromagnetic ordering with high saturation moment. The high conductivity in the SrRuO 3 layer can be attributed to the effect of electrostatic carrier accumulation induced by the BaTiO 3 layers. Density-functional-theory calculations provide insights into the origin of the observed properties of the thin SrRuO 3 film. The present results pave a way to design materials with desired functionalities at oxide interfaces.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [1];  [1];  [1]; ORCiD logo [5]; ORCiD logo [6];  [1];  [1];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Louisiana State Univ., Baton Rouge, LA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. SRM Institute of Science and Technology, Tamil Nadu (India)
  4. SRM Institute of Science and Technology, Tamil Nadu (India); Vanderbilt Univ., Nashville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
  6. Vanderbilt Univ., Nashville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1580240
Report Number(s):
BNL-212470-2019-JAAM
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
SC0012704; SC0002136; AC02-98CH10886; FG02-09ER46554
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Meng, Meng, Wang, Zhen, Fathima, Aafreen, Ghosh, Saurabh, Saghayezhian, Mohammad, Taylor, Joel, Jin, Rongying, Zhu, Yimei, Pantelides, Sokrates T., Zhang, Jiandi, Plummer, E. W., and Guo, Hangwen. Interface-induced magnetic polar metal phase in complex oxides. United States: N. p., 2019. Web. doi:10.1038/s41467-019-13270-7.
Meng, Meng, Wang, Zhen, Fathima, Aafreen, Ghosh, Saurabh, Saghayezhian, Mohammad, Taylor, Joel, Jin, Rongying, Zhu, Yimei, Pantelides, Sokrates T., Zhang, Jiandi, Plummer, E. W., & Guo, Hangwen. Interface-induced magnetic polar metal phase in complex oxides. United States. doi:10.1038/s41467-019-13270-7.
Meng, Meng, Wang, Zhen, Fathima, Aafreen, Ghosh, Saurabh, Saghayezhian, Mohammad, Taylor, Joel, Jin, Rongying, Zhu, Yimei, Pantelides, Sokrates T., Zhang, Jiandi, Plummer, E. W., and Guo, Hangwen. Wed . "Interface-induced magnetic polar metal phase in complex oxides". United States. doi:10.1038/s41467-019-13270-7. https://www.osti.gov/servlets/purl/1580240.
@article{osti_1580240,
title = {Interface-induced magnetic polar metal phase in complex oxides},
author = {Meng, Meng and Wang, Zhen and Fathima, Aafreen and Ghosh, Saurabh and Saghayezhian, Mohammad and Taylor, Joel and Jin, Rongying and Zhu, Yimei and Pantelides, Sokrates T. and Zhang, Jiandi and Plummer, E. W. and Guo, Hangwen},
abstractNote = {Polar metals are commonly defined as metals with polar structural distortions. Strict symmetry restrictions make them an extremely rare breed as the structural constraints favor insulating over metallic phase. Moreover, no polar metals are known to be magnetic. Here we report on the realization of a magnetic polar metal phase in a BaTiO3/SrRuO3/BaTiO3 heterostructure. Electron microscopy reveals polar lattice distortions in three-unit-cells thick SrRuO3 between BaTiO3 layers. Electrical transport and magnetization measurements reveal that this heterostructure possesses a metallic phase with high conductivity and ferromagnetic ordering with high saturation moment. The high conductivity in the SrRuO3 layer can be attributed to the effect of electrostatic carrier accumulation induced by the BaTiO3 layers. Density-functional-theory calculations provide insights into the origin of the observed properties of the thin SrRuO3 film. The present results pave a way to design materials with desired functionalities at oxide interfaces.},
doi = {10.1038/s41467-019-13270-7},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {11}
}

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