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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.27061 |
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| _version_ | 1866911242755506176 |
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| author | Stuermer, Riley VanEssen, Collin Byers, Jacob Ferrer, Keith Gudem, Prasad Kienle, Diego Fransson, Jonas Vaidyanathan, Mani |
| author_facet | Stuermer, Riley VanEssen, Collin Byers, Jacob Ferrer, Keith Gudem, Prasad Kienle, Diego Fransson, Jonas Vaidyanathan, Mani |
| contents | Chiral molecules are known to preferentially select electrons with a particular spin state, an effect termed chirality-induced spin selectivity (CISS). In this work, the transient CISS dynamics in a chiral molecule are investigated through time-dependent quantum-transport simulations, an important step toward further understanding CISS and its application in devices such as magnetoresistive random access memories and spin-based quantum computers. We show that a nonzero spin polarization throughout the chiral molecule can be attributed to a spin-dependent group velocity of electrons. Contrary to the case where a chiral molecule is connected to a single lead, this spin polarization persists into the steady state when two leads are connected. We show that the simulated spin polarization qualitatively agrees with a reference experiment, as evidenced by the distinct magnetic-field signatures calculated from the spin polarization within a monolayer of chiral molecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_27061 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin Dependence of Charge Dynamics and Group Velocity in Chiral Molecules Stuermer, Riley VanEssen, Collin Byers, Jacob Ferrer, Keith Gudem, Prasad Kienle, Diego Fransson, Jonas Vaidyanathan, Mani Mesoscale and Nanoscale Physics Chiral molecules are known to preferentially select electrons with a particular spin state, an effect termed chirality-induced spin selectivity (CISS). In this work, the transient CISS dynamics in a chiral molecule are investigated through time-dependent quantum-transport simulations, an important step toward further understanding CISS and its application in devices such as magnetoresistive random access memories and spin-based quantum computers. We show that a nonzero spin polarization throughout the chiral molecule can be attributed to a spin-dependent group velocity of electrons. Contrary to the case where a chiral molecule is connected to a single lead, this spin polarization persists into the steady state when two leads are connected. We show that the simulated spin polarization qualitatively agrees with a reference experiment, as evidenced by the distinct magnetic-field signatures calculated from the spin polarization within a monolayer of chiral molecules. |
| title | Spin Dependence of Charge Dynamics and Group Velocity in Chiral Molecules |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.27061 |