Pasquale, Gabriele and Faria Junior, Paulo E. and Feng, Shun and Collette, Eloi and Watanabe, Kenji and Taniguchi, Takashi and Fabian, Jaroslav and Kis, Andras (2025) Spin polarization detection via chirality-induced tunnelling currents in indium selenide. NATURE MATERIALS, 24 (2). pp. 212-218. ISSN 1476-1122, 1476-4660
Full text not available from this repository. (Request a copy)Abstract
Chirality, a basic property of symmetry breaking, is crucial for fields such as biology and physics. Recent advances in the study of chiral systems have stimulated interest in the discovery of symmetry-breaking states that enable exotic phenomena such as spontaneous gyrotropic order and superconductivity. Here we examine the interaction between light chirality and electron spins in indium selenide and study the effect of magnetic field on emerging tunnelling photocurrents at the Van Hove singularity. Although the effect is symmetric under linearly polarized light excitation, a non-symmetric signal emerges when the excitation is circularly polarized, making it possible to electrically detect light's chirality. Our study shows a negligible out-of-plane g-factor for few-layer indium selenide at the valence band edge, resulting in an unbalanced Zeeman splitting in hexagonal boron nitride spin bands. This finding allows us to measure the change in energy barrier height with exceptional resolution (similar to 15 mu eV). Furthermore, we confirm the long-standing theoretical prediction of spin-polarized hole accumulation in the flat valence band at increasing laser powers.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Jul 2026 08:10 |
| Last Modified: | 28 Jul 2026 08:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67277 |
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