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arXiv · 2308.04350

Chirality-induced spin splitting in 1D InSeI

Shu Zhao·Jiaming Hu·Ziye Zhu·Xiaoping Yao·Wenbin Li
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Abstract

Spin-orbit coupling in chiral materials can induce chirality-dependent spin splitting, enabling electrical manipulation of spin polarization. Here, we use first-principles calculations to investigate the electronic states of chiral one-dimensional (1D) semiconductor InSeI, which has two enantiomorphic configurations with left- and right-handedness. We find that opposite spin states exist in the left- and right-handed 1D InSeI with significant spin splitting and spin-momentum collinear locking. Although the spin states at the conduction band minimum (CBM) and valence band maximum (VBM) of 1D InSeI are both nearly degenerate, a direct-to-indirect bandgap transition occurs when a moderate tensile strain ($\sim$4%) is applied along the 1D chain direction, leading to a sizable spin splitting ($\sim$0.11 eV) at the CBM. These findings indicate that 1D InSeI is a promising material for chiral spintronics.

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Shu Zhao, Jiaming Hu, Ziye Zhu, Xiaoping Yao, Wenbin Li. 2023-08-08. Chirality-induced spin splitting in 1D InSeI. https://doi.org/10.1063/5.0164202

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