2019/07/31 by Wenxu Zhang, Zhao Teng, Huizhong Zeng +4 · 7 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Electric field #Ferroelectricity #Ferromagnetism #Graphene research and applications #Polarization (electrochemistry) #Polarization density #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Spintronics #Topological Materials and Phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.1002/pssb.202000143
published in physica status solidi (b) 257(9) (Wiley) · 6 figures
openalex created_date 2019/07/23 · arxiv created 2019/11/14 · openalex publication_date 2020/05/16 · arxiv updated 2020/07/09 · openalex updated_date 2026/08/08
Controlling charge‐spin current conversion by electric fields is crucial in spintronic devices, which can now be realized in diatom ferroelectric semiconductor GeTe. It is well demonstrated that ferroelectricity can change the spin texture in this compound. Herein, it is shown that the spin Hall conductivity (SHC) can be further tuned by ferroelectricity based on the density functional theory calculations. The spin texture variation driven by the electric fields is elucidated from the symmetry point of view, highlighting the interlocked spin and orbital degrees of freedom. It is observed that the origin of SHC can be attributed to the Rashba effect and the intrinsic spin–orbit coupling. The magnitude of one component of SHC can reach as large as 100 in the vicinity of the band edge, which is promising for engineering spintronic devices. The work on tunable spin transport properties via the ferroelectric polarization brings novel assets into the field of spintronics.