Research paperTheoreticalComputed RamanInterplay of Rashba and valley-Zeeman splittings in weak localization of spin-orbit coupled grapheneL. E. GolubarXiv·2025·10.1103/ymt3-48l9·arXiv:2509.18332AbstractWeak localization theory is developed for graphene heterostructures with transition metal dichalcogenides and topological insulators where the Rashba and valley-Zeeman spin-splittings are large enough. The anomalous magnetoresistance in low fields caused by weak localization is calculated. It is shown that the valley-Zeeman splitting has no effect on weak localization in the absence of Rashba splitting but it results in the change of the magnetoconductivity sign in the Rashba-coupled graphene. Inter-valley scattering also affects the quantum correction to the conductivity resulting in its sign reversal. Analytical expressions are obtained for the anomalous magnetoconductivity at arbitrary relations between the Rashba and valley-Zeeman splittings as well as the inter-valley scattering rates.Read more
Research paperTheoreticalComputed RamanInterplay of Rashba and valley-Zeeman splittings in weak localization of spin-orbit coupled grapheneL. E. GolubarXiv·2025·10.1103/ymt3-48l9·arXiv:2509.18332AbstractWeak localization theory is developed for graphene heterostructures with transition metal dichalcogenides and topological insulators where the Rashba and valley-Zeeman spin-splittings are large enough. The anomalous magnetoresistance in low fields caused by weak localization is calculated. It is shown that the valley-Zeeman splitting has no effect on weak localization in the absence of Rashba splitting but it results in the change of the magnetoconductivity sign in the Rashba-coupled graphene. Inter-valley scattering also affects the quantum correction to the conductivity resulting in its sign reversal. Analytical expressions are obtained for the anomalous magnetoconductivity at arbitrary relations between the Rashba and valley-Zeeman splittings as well as the inter-valley scattering rates.Read more
Research paperTheoreticalComputed RamanInterplay of Rashba and valley-Zeeman splittings in weak localization of spin-orbit coupled grapheneL. E. GolubarXiv·2025·10.1103/ymt3-48l9·arXiv:2509.18332AbstractWeak localization theory is developed for graphene heterostructures with transition metal dichalcogenides and topological insulators where the Rashba and valley-Zeeman spin-splittings are large enough. The anomalous magnetoresistance in low fields caused by weak localization is calculated. It is shown that the valley-Zeeman splitting has no effect on weak localization in the absence of Rashba splitting but it results in the change of the magnetoconductivity sign in the Rashba-coupled graphene. Inter-valley scattering also affects the quantum correction to the conductivity resulting in its sign reversal. Analytical expressions are obtained for the anomalous magnetoconductivity at arbitrary relations between the Rashba and valley-Zeeman splittings as well as the inter-valley scattering rates.Read more
Research paperTheoreticalComputed RamanInterplay of Rashba and valley-Zeeman splittings in weak localization of spin-orbit coupled grapheneL. E. GolubarXiv·2025·10.1103/ymt3-48l9·arXiv:2509.18332AbstractWeak localization theory is developed for graphene heterostructures with transition metal dichalcogenides and topological insulators where the Rashba and valley-Zeeman spin-splittings are large enough. The anomalous magnetoresistance in low fields caused by weak localization is calculated. It is shown that the valley-Zeeman splitting has no effect on weak localization in the absence of Rashba splitting but it results in the change of the magnetoconductivity sign in the Rashba-coupled graphene. Inter-valley scattering also affects the quantum correction to the conductivity resulting in its sign reversal. Analytical expressions are obtained for the anomalous magnetoconductivity at arbitrary relations between the Rashba and valley-Zeeman splittings as well as the inter-valley scattering rates.Read more
