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    Chirality-Induced Majorana Zero Modes and Majorana Polarization
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    • Song Chen
      Song Chen
      School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
      More by Song Chen
    • Hua-Hua Fu*
      Hua-Hua Fu
      School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
      Institute for Quantum Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
      *Email: [email protected]
      More by Hua-Hua Fu
      Orcidhttps://orcid.org/0000-0003-3920-6324
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    ACS Nano

    Cite this: ACS Nano 2024, 18, 50, 34126–34133
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    https://doi.org/10.1021/acsnano.4c10395
    Published December 5, 2024
    Copyright © 2024 American Chemical Society
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    Abstract

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    Realizing Majorana Fermions has always been regarded as a crucial and formidable task in topological superconductors. In this work, we report a physical mechanism and a material platform for realizing Majorana zero modes (MZMs). This material platform consists of open circular helix molecule (CHM) proximity coupled with an s-wave superconductor (under an external magnetic field) or interconnected-CHM chain coupled with a phase-bias s-wave superconducting heterostructure (without any external magnetic field). MZMs generated here are tightly associated with the structural chirality in CHMs. Notably, the left- and right-handedness results in completely opposite Majorana polarization (MP), leading us to refer to this phenomenon as chirality-induced MP (CIMP). Importantly, the local CIMP is closely linked to chirality-induced spin polarization, providing us with an effective way to regulate MZMs through the chirality-induced spin selectivity (CISS) effect. Furthermore, MZMs can be detected by the spin-polarized current measurements related to the CISS in chiral materials.

    Copyright © 2024 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsnano.4c10395.

    • Theoretical methods for calculating differential conductance and Z2 topological invariant (Section I); the dependence of Majorana polarization and spin polarization on chirality (Section II); the relationship between the different components of spin polarization and Majorana polarization with the structural chirality (Table S1) (PDF)

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    ACS Nano

    Cite this: ACS Nano 2024, 18, 50, 34126–34133
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsnano.4c10395
    Published December 5, 2024
    Copyright © 2024 American Chemical Society
    Request reuse permissions

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