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Abstract <p>In this paper, spin-dependent transmission, polarization and dwell time of light hole (LH) and heavy hole (HH) in Si<sub>0.75</sub>Ge<sub>0.25</sub>/Si double-barrier heterostructure are theoretically examined. The magnitude of the in-plane wave vector enhances the separation betwixt the spin components. The degree of spin polarization of HH is higher than LH. The augmenting breadth of the barrier constrains the transparency apex for both LH and HH. An exceedingly diminished monoenergetic barrier transparency for HH is discerned. Dwell time is calculated and the dwell time of spin-down holes is greater than the spin-up holes. Both the in-plane wave vector and barrier width enhance the differences between spin-up and spin-down holes. Bruno-Karunakaran-Gnanasekar-Chandramohan (BGKC) observation is also verified in this considered heterostructure. A most impeccable spin-dependent hole filter is herein proposed, grounded upon the aforementioned results.</p>

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Resonant Tunneling of Holes in Si0.75Ge0.25/Si Heterostructures with Rashba Spin-orbit Interaction for Spin Filter Application: Effect of in-plane Wave Vector and Barrier Width

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • K. Balamurugan,
  • G. Rohini,
  • L. Bruno Chandrasekar,
  • P. Shunmuga Sundaram

摘要

Abstract

In this paper, spin-dependent transmission, polarization and dwell time of light hole (LH) and heavy hole (HH) in Si0.75Ge0.25/Si double-barrier heterostructure are theoretically examined. The magnitude of the in-plane wave vector enhances the separation betwixt the spin components. The degree of spin polarization of HH is higher than LH. The augmenting breadth of the barrier constrains the transparency apex for both LH and HH. An exceedingly diminished monoenergetic barrier transparency for HH is discerned. Dwell time is calculated and the dwell time of spin-down holes is greater than the spin-up holes. Both the in-plane wave vector and barrier width enhance the differences between spin-up and spin-down holes. Bruno-Karunakaran-Gnanasekar-Chandramohan (BGKC) observation is also verified in this considered heterostructure. A most impeccable spin-dependent hole filter is herein proposed, grounded upon the aforementioned results.