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arXiv · 2605.30240

Electronic correlations driving Chirality-Induced Spin Selectivity

Jacek Herbrych·Maria Daghofer
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Abstract

We explicitly account for electron-electron interactions when modeling low-dimensional helical organic molecules. We show that competition between various hopping channels, together with interaction-induced double- and superexchange mechanisms, can stabilize non-collinear helical magnetic order. The resulting single-electron bands exhibit partial spin polarization, a manifestation of $p$-wave magnetism. Using density-matrix renormalization group, cluster perturbation theory, and Monte Carlo methods, we find that even vanishingly small spin-orbit coupling triggers strong spin selectivity at temperatures significantly above the spin-orbit scale. While strong correlations are essential for this mechanism, long-range spin ordering is not required. We thus propose non-collinear spin correlations driven by Coulomb interactions as an explanation of chirality-induced spin selectivity and discuss connections to experiments.

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Jacek Herbrych, Maria Daghofer. 2026-05-28. Electronic correlations driving Chirality-Induced Spin Selectivity. https://arxiv.org/abs/2605.30240

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