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Title: Giant switchable Rashba effect in oxide heterostructures

Journal Article · · Advanced Materials Interfaces
 [1];  [1];  [2];  [3];  [4];  [1]
  1. Vienna Univ. of Technology, Vienna (Austria)
  2. Vienna Univ. of Technology, Vienna (Austria); Yancheng Inst. of Technology (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Computational Condensed Matter Physics Lab., Wako, Saitama (Japan); Advanced Inst. for Computational Science, Kobe, Hyogo (Japan); Center for Emergent Matter Science, Wako, Saitama (Japan)

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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC00112704
OSTI ID:
1182510
Report Number(s):
BNL-107478-2015-JA; BNL-107478-2015-JAAM; R&D Project: PO015; KC0202030
Journal Information:
Advanced Materials Interfaces, Vol. 2, Issue 5; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (7)

Rashba splitting in bilayer transition metal dichalcogenides controlled by electronic ferroelectricity journal October 2019
Possibility of combining ferroelectricity and Rashba-like spin splitting in monolayers of the 1 T -type transition-metal dichalcogenides M X 2 ( M = Mo , W ; X = S , Se , Te ) journal November 2016
Impact of semiconducting electrodes on the electroresistance of ferroelectric tunnel junctions journal February 2018
Enhanced Crystallinity, Dielectric, and Energy Harvesting Performances of Surface-Treated Barium Titanate Hollow Nanospheres/PVDF Nanocomposites journal May 2015
Switchable Rashba effect by dipole moment switching in an Ag 2 Te monolayer journal August 2018
Interface-based tuning of Rashba spin-orbit interaction in asymmetric oxide heterostructures with 3d electrons journal July 2019
Enhancement of bulk photovoltaic effect in topological insulators text January 2015