We report a well-resolved 0.7 conductance anomaly at G=0.7×(2e2/h) in bilayer graphene/WSe2 quantum point contacts. Proximity-enhanced spin-orbit coupling splits the four-fold ground state of bilayer graphene into well-separated spin-valley locked Kramers doublets. The anomaly emerges between these opposite spin-valley states. Despite fundamentally different band structure and wavefunction characteristics, the temperature and bias phenomenology closely mirror GaAs systems. In contrast, the parallel magnetic field response differs significantly, confirming the central role of valley degrees of freedom. This opens new pathways to study valley-exchange correlation physics in regimes inaccessible to conventional semiconductors.
@article{arxiv.2511.06384,
title = {Spin-valley 0.7 anomaly in bilayer graphene/WSe$_2$ quantum point contacts},
author = {Jonas D. Gerber and Efe Ersoy and Michele Masseroni and Markus Niese and Artem O. Denisov and Christoph Adam and Lara Ostertag and Jessica Richter and Takashi Taniguchi and Kenji Watanabe and Yigal Meir and Thomas Ihn and Klaus Ensslin},
journal= {arXiv preprint arXiv:2511.06384},
year = {2025}
}