Spin mapping of surface and bulk Rashba states in ferroelectric α -GeTe(111) films

A comprehensive mapping of the spin polarization of the electronic bands in ferroelectric α -GeTe(111) films has been performed using a time-of- ight momentum microscope equipped with an imaging spin filter that enables a simultaneous measurement of more than 10.000 data points (voxels). A Rashba type splitting of both surface and bulk bands with opposite spin helicity of the inner and outer Rashba bands is found revealing a complex spin texture at the Fermi energy. The switchable inner electric field of GeTe implies new functionalities for spintronic devices.

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https://oa.tib.eu/renate/handle/123456789/4146

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Physik

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