Theory of Chirality Induced Spin Selectivity: Progress and Challenges

TL;DR

This paper critically reviews the current theoretical understanding of the chirality-induced spin selectivity (CISS) effect, highlighting progress, challenges, and future research directions across electron transmission, transport, and chemical reactions.

Contribution

It offers a comprehensive overview of recent developments in CISS theory, identifying key challenges and outlining future research opportunities.

Findings

CISS effects significantly influence electron processes in chiral molecules.

Current theories explain some aspects but face challenges in fully describing CISS phenomena.

Identifies research gaps and proposes directions for advancing understanding of CISS.

Abstract

We provide a critical overview of the theory of the chirality-induced spin selectivity (CISS) effect, i.e., phenomena in which the chirality of molecular species imparts significant spin selectivity to various electron processes. Based on discussions in a recently held workshop, and further work published since, we review the status of CISS effects - in electron transmission, electron transport, and chemical reactions. For each, we provide a detailed discussion of the state-of-the-art in theoretical understanding and identify remaining challenges and research opportunities.