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Chirality induced spin selectivity: A classical spin-off.

Yun Chen1, Oded Hod1

  • 1Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel.

The Journal of Chemical Physics
|June 22, 2023
PubMed
Summary
This summary is machine-generated.

This study shows that angular momentum selectivity, previously only seen in quantum mechanics, can occur in classical systems. A classical variant of the chirality-induced spin selectivity (CISS) effect uses particle self-rotation for spatial separation in chiral environments.

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Area of Science:

  • Physics
  • Chemical Engineering
  • Materials Science

Background:

  • Chirality-induced spin selectivity (CISS) is a quantum mechanical phenomenon.
  • CISS effect separates particles based on spin and chirality.

Purpose of the Study:

  • To demonstrate angular momentum selectivity in classical systems.
  • To explore a classical analogue of the CISS effect.
  • To investigate potential applications in enantio-separation.

Main Methods:

  • Replaced electron spin with self-rotation of finite-volume bodies.
  • Coupled self-rotation to orbital motion via a helical tube and wall friction.
  • Studied C60 molecules driven through a rigid helical channel.

Main Results:

  • Demonstrated classical angular momentum selectivity.
  • Identified resemblances and differences with the quantum CISS effect.
  • Showcased spatial separation of C60 molecules with opposite spins.

Conclusions:

  • Classical systems can exhibit angular momentum selectivity.
  • A new paradigm for enantio-separation may emerge from this classical effect.
  • Wall friction acts as a dissipative spin-orbit coupling analogue.