Abstract
This paper uses light polarization dependent spin-resolved photoemission and ab initio calculations to show that bulk states of ferroelectric GeTe are fully spin polarized, making this material a promising candidate for room temperature spintronics applications.
Highlights
The plethora of novel physical phenomena driven by a spin-orbit interaction (SOI) has attracted a lot of attention recently [1]
From our spinand angle-resolved photoemission (SARPES) experiment it is clear that the degree of initial state spin polarization of the states at the top of the valence band has to be very high and close to 100%
We only focus on the magnitude of the total degree of initial state spin polarization
Summary
The plethora of novel physical phenomena driven by a spin-orbit interaction (SOI) has attracted a lot of attention recently [1]. For the aforementioned surface state of Bi2Se3, the link between orbital and spin angular momentum is nicely illustrated by spinand angle-resolved photoemission (SARPES) experiments where the measured spin of the photoelectron reverses when the light polarization is changed and different orbital components are probed [19,20]. This concept was taken further by showing that if a linear combination of orbital components is probed, the measured spin polarization rotates in the plane perpendicular to the original direction [21]. Our work provides evidence of fully spin-polarized initials states in any 2D or 3D system without the need for additional symmetry constraints, but based on the intrinsic orbital composition
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