First-principles theory of giant Rashba-like spin-splitting in bulk ferroelectrics

Abstract

Recently large Rashba-like spin splitting has been observed in certain bulk ferroelectrics. In contrast with the relativistic Rashba effect, the chiral spin texture and large spin-splitting of the electronic bands depend strongly on the character of the band and atomic spin-orbit coupling. We establish that this can be traced back to the so-called orbital Rashba effect, also in the bulk. This leads to an additional dependence on the orbital composition of the bands, which is crucial for a complete picture of the effect. Results from first-principles calculations on ferroelectic GeTe verify the key predictions of the model.

arXiv comment4 pages, 4 figures

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Cited by in corpus (7)

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• Bulk Rashba Effect in Multiferroics: a theoretical prediction for BiCoO3
• Origin of Rashba spin-splitting and strain tunability in ferroelectric bulk CsPbF${}_3$
• Spectroscopic Signatures of Gate-Controlled Superconducting Phases
• Reversal of Orbital Hall Conductivity and Emergence of Tunable Topological Quantum States in Orbital Hall Insulator
• Current-induced spin and orbital polarization in the ferroelectric Rashba semiconductor GeTe