Fully spin-polarized bulk states in ferroelectric GeTe

Autor: Juraj Krempaský, Mauro Fanciulli, Laurent Nicolaï, Jan Minár, Henrieta Volfová, Ondřej Caha, Valentine V. Volobuev, Jaime Sánchez-Barriga, Martin Gmitra, Koichiro Yaji, Kenta Kuroda, Shik Shin, Fumio Komori, Gunther Springholz, J. Hugo Dil
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Physical Review Research, Vol 2, Iss 1, p 013107 (2020)
Druh dokumentu: article
ISSN: 2643-1564
DOI: 10.1103/PhysRevResearch.2.013107
Popis: By measuring the spin polarization of GeTe films as a function of light polarization we observed that the bulk states are fully spin polarized in the initial state, in strong contrast with observations for other systems with a strong spin-orbit interaction and the surface derived states in the same system. In agreement with state-of-the-art theory, our experimental results show that fully spin-polarized bulk states are an intrinsic property of the ferroelectric Rashba semiconductor α-GeTe(111). The fact that the measured spin-polarization vector does not change with light polarization can be explained by the absence of a mixing of states with a different total angular momentum J.
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