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Valley and spin-dependent shot noise properties in monolayer MoS2-based superlattice

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Abstract

The spin polarization and the valley and spin-dependent shot noise properties in monolayer MoS2-based superlattice in presence of the extrinsic and intrinsic Rashba spin–orbit interaction (ERSOI and IRSOI) are theoretically investigated using the transfer-matrix approach. It is shown that spin-polarization can be adjusted via the electrostatic barrier height, the number of superlattice barriers, and the ERSOI strength. The spin and valley-dependent Fano factor through the monolayer MoS2 superlattice was calculated and analyzed. It was found that the Fano factor depends on the valley and spin degrees of freedom, the electrostatic barrier height, the number of MoS2 superlattice barriers (N), and ERSOI strength. The Fano factor has a Poissonian value for some values of the barrier height. Moreover, it was found that the Fano factor has a gap with respect to the ERSOI strength. Also, when \(N \ge 5\), the Fano factor approaches 1 for one of the valleys.

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Authors and Affiliations

  1. Department of Physics, Faculty of Sciences, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran

    Farhad Sattari

  2. Nanoscience and Nanotechnology Research Group, University of Mohaghegh Ardabili, Ardabil, Iran

    Farhad Sattari

  3. Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran

    Soghra Mirershadi

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  1. Farhad Sattari
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  2. Soghra Mirershadi
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Correspondence to Farhad Sattari.

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Sattari, F., Mirershadi, S. Valley and spin-dependent shot noise properties in monolayer MoS2-based superlattice. Indian J Phys 96, 3501–3507 (2022). https://doi.org/10.1007/s12648-021-02258-z

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