Polarization characteristics of valley and spin using monolayer MoS2 structure modulated by strain

Ruhao Liu; Yan Zhang

doi:10.1117/12.3025464

28 February 2024 Polarization characteristics of valley and spin using monolayer MoS₂ structure modulated by strain

Ruhao Liu, Yan Zhang

Proceedings Volume 13071, International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023); 130712O (2024) https://doi.org/10.1117/12.3025464
Event: International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023), 2023, Shenyang, China

Abstract

Piezotronics and piezo-phototronics are new emerging fields that have already found applications in nanogenerators, piezoelectric transistors, strain sensors and LEDs. The strain-induced piezoelectric potential plays a crucial role in modulating charge-carrier transport properties in piezoelectric semiconductor materials, especially for two-dimensional (2D) materials. In this work, we theoretically study the piezotronic effect, circularly polarized light and Zeeman field’s impact on the modulation of valley and spin properties in monolayer (ML) MoS₂ nanoribbon. We create two ferromagnetic regions in the ML MoS₂ nanoribbon to simultaneously manipulate the transport properties of valley and spin using externally applied polarized light and strain. In the proposed junction of ML MoS₂, which consists of two barriers modulated by strain, light and Zeeman field, an intriguing coexistence of perfect valley and spin polarization emerges. Our investigation reveals that among these three effects, the huge piezoelectric effect plays a leading role.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ruhao Liu and Yan Zhang "Polarization characteristics of valley and spin using monolayer MoS₂ structure modulated by strain", Proc. SPIE 13071, International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023), 130712O (28 February 2024); https://doi.org/10.1117/12.3025464

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