First-principles Study of Rashba Spin Splitting at Strained SrTiO3(001) Surfaces

Abstract

We investigated the Rashba spin splittings in a compressive-strained SrTiO${}_3$(001) ultra thin-film using first-principles calculations. The effect of the polarization due to the compressive strain leads to the 2DEG with large Rashba spin splittings, where the sheet carrier density is of the same order of magnitude as that of the heterostructure LaAlO${}_3$/SrTiO${}_3$ ($\sim 10^{14}$ cm${}^{-2}$). Some localized surface states (SSs) show the giant Rashba coefficient ${\alpha }_R$ larger than 100 meV$\cdot$Å.

arXiv comment4 pages, 3 figures, Only the Authors field in metadata was corrected and the Journal-ref and DOI fields were added

References in corpus (6)

• New Perspectives for Rashba Spin-Orbit Coupling
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO${}_3$ (001)
• Effects of ferroelectric polarization on surface phase diagram: an evolutionary algorithm study of the BaTiO${}_3$(001) surface
• Strain-induced large spin splitting and persistent spin helix at LaAlO${}_3$/SrTiO${}_3$ interface
• First-principles Study of Rashba Effect in Ultra-thin Bismuth Surface Alloys