Authors
Yaqing Han, Siqi Jiang, Jingkuan Xiao, Jiawei Jiang, Yulu Liu, Jiabei Huang, Yu Du, Di Zhang, Fuzhuo Lian, Wanting Xu, Siqin Wang, Kenji Watanabe, Takashi Taniguchi, Xiaoxiang Xi, Alexander S Mayorov, Renjun Du, Kai Chang, Hongxin Yang, Lei Wang, Geliang Yu
Published in
Physical review letters. Volume 137. Issue 2. Pages 027001. Jul 10, 2026.
Abstract
Engineering proximity effects in twisted van der Waals heterostructures offers a powerful platform for designing electronic properties. While theoretical predictions of quantum interference in transition metal dichalcogenide-encapsulated graphene can selectively control the spin-orbit coupling component, experimental realizations have remained elusive. Here, we report pure valley-Zeeman spin-orbit coupling in monolayer graphene achieved by encapsulation between two parallel twisted WSe_{2} monolayers. We observed a symmetry-enforced reordering of Landau levels, which is driven by the competition between the fixed valley-Zeeman energy and the magnetic-field-dependent cyclotron energy. This reordering is characterized by a transition from symmetry-broken states in the quantum Hall effect to a restored fourfold degeneracy with integer or half-integer quantum Hall sequences. We also demonstrate the ability to completely quench the proximity spin-orbit coupling by tuning the encapsulated geometry.
PMID:
42503106
Bibliographic data and abstract were imported from PubMed on 26 Jul 2026.
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