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 ${\sigma }_{xy}^z$ can reach as large as 100 $\hslash /e({\mathrm{\Omega }}^{-1}{\text{cm}}^{-1})$ 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.

中文翻译：

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通过铁电极化调整GeTe中自旋霍尔电导率

在自旋电子器件中，通过电场控制电荷自旋电流转换至关重要，现在可以在硅藻铁电半导体GeTe中实现。充分证明铁电可以改变该化合物的自旋织构。在此，示出了可以基于密度泛函理论计算通过铁电来进一步调节自旋霍尔电导率（SHC）。从对称性的角度阐明了电场驱动的自旋纹理变化，突出了互锁的自旋和轨道自由度。可以看出，SHC的起源可归因于Rashba效应和固有的自旋-轨道耦合。SHC的一种成分的大小${\sigma }_{Xÿ}^{ž}$ 可以达到100 $\hslash /Ë（{\mathrm{\Omega }}^{-\mathrm{1个}}{\text{厘米}}^{-\mathrm{1个}}）$在带边缘附近，这对于工程自旋电子器件很有希望。通过铁电极化可调谐自旋输运性质的工作为自旋电子学领域带来了新的资产。