Giant switchable Rashba effect in oxide heterostructures
Abstract
One of the most fundamental phenomena and a reminder of the electron’s relativistic nature is the Rashba spin splitting for broken inversion symmetry. Usually this splitting is a tiny relativistic correction. Interfacing ferroelectric BaTiO₃ and a 5d (or 4d) transition metal oxide with a large spin-orbit coupling, Ba(Os,Ir,Ru)O₃, we show that giant Rashba spin splittings are indeed possible and even controllable by an external electric field. Based on density functional theory and a microscopic tight binding understanding, we conclude that the electric field is amplified and stored as a ferroelectric Ti-O distortion which, through the network of oxygen octahedra, induces a large (Os,Ir,Ru)-O distortion. The BaTiO₃/Ba(Os,Ru,Ir)O₃ heterostructure is hence the ideal test station for switching and studying the Rashba effect and allows applications at room temperature.
- Authors:
-
- Vienna Univ. of Technology, Vienna (Austria)
- Vienna Univ. of Technology, Vienna (Austria); Yancheng Inst. of Technology (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Computational Condensed Matter Physics Lab., Wako, Saitama (Japan); Advanced Inst. for Computational Science, Kobe, Hyogo (Japan); Center for Emergent Matter Science, Wako, Saitama (Japan)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1182510
- Report Number(s):
- BNL-107478-2015-JA; BNL-107478-2015-JAAM
Journal ID: ISSN 2196-7350; R&D Project: PO015; KC0202030
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Materials Interfaces
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 5; Journal ID: ISSN 2196-7350
- Publisher:
- Wiley-VCH
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Zhong, Zhicheng, Si, Liang, Zhang, Qinfang, Yin, Wei-Guo, Yunoki, Seiji, and Held, Karsten. Giant switchable Rashba effect in oxide heterostructures. United States: N. p., 2015.
Web. doi:10.1002/admi.201400445.
Zhong, Zhicheng, Si, Liang, Zhang, Qinfang, Yin, Wei-Guo, Yunoki, Seiji, & Held, Karsten. Giant switchable Rashba effect in oxide heterostructures. United States. https://doi.org/10.1002/admi.201400445
Zhong, Zhicheng, Si, Liang, Zhang, Qinfang, Yin, Wei-Guo, Yunoki, Seiji, and Held, Karsten. Sun .
"Giant switchable Rashba effect in oxide heterostructures". United States. https://doi.org/10.1002/admi.201400445. https://www.osti.gov/servlets/purl/1182510.
@article{osti_1182510,
title = {Giant switchable Rashba effect in oxide heterostructures},
author = {Zhong, Zhicheng and Si, Liang and Zhang, Qinfang and Yin, Wei-Guo and Yunoki, Seiji and Held, Karsten},
abstractNote = {One of the most fundamental phenomena and a reminder of the electron’s relativistic nature is the Rashba spin splitting for broken inversion symmetry. Usually this splitting is a tiny relativistic correction. Interfacing ferroelectric BaTiO₃ and a 5d (or 4d) transition metal oxide with a large spin-orbit coupling, Ba(Os,Ir,Ru)O₃, we show that giant Rashba spin splittings are indeed possible and even controllable by an external electric field. Based on density functional theory and a microscopic tight binding understanding, we conclude that the electric field is amplified and stored as a ferroelectric Ti-O distortion which, through the network of oxygen octahedra, induces a large (Os,Ir,Ru)-O distortion. The BaTiO₃/Ba(Os,Ru,Ir)O₃ heterostructure is hence the ideal test station for switching and studying the Rashba effect and allows applications at room temperature.},
doi = {10.1002/admi.201400445},
journal = {Advanced Materials Interfaces},
number = 5,
volume = 2,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}
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