Interface-induced magnetic polar metal phase in complex oxides

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

doi:10.1038/s41467-019-13270-7

Interface-induced magnetic polar metal phase in complex oxides

Journal Article · Wed Nov 20 00:00:00 UTC 2019 · Nature Communications

DOI:https://doi.org/10.1038/s41467-019-13270-7· OSTI ID:1619598

Meng, Meng; Wang, Zhen; Fathima, Aafreen; Ghosh, Saurabh; ; Taylor, Joel; Jin, Rongying; Zhu, Yimei; ; Zhang, Jiandi; Plummer, E. W.; Guo, Hangwen

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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Vanderbilt Univ., Nashville, TN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-98CH10886; FG02-09ER46554; SC0002136; SC0012704

OSTI ID:: 1619598

Alternate ID(s):: OSTI ID: 1580240
OSTI ID: 1598150

Report Number(s):: BNL--212470-2019-JAAM; 5248; PII: 13270

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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