Giant Rashba-Type Spin Splitting in Ferroelectric GeTe(111).

Liebmann, Marcus; Rinaldi, Christian; Di Sante, Domenico; Kellner, Jens; Pauly, Christian; Wang, Rui Ning; Boschker, Jos Emiel; Giussani, Alessandro et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Photoelectron spectroscopy in combination with piezoforce microscopy reveals that the helicity of Rashba bands is coupled to the nonvolatile ferroelectric polarization of GeTe(111). A novel surface Rashba band is found and fingerprints of a bulk Rashba band are identified by comparison with density functional theory calculations.