The magnetoconductivity δσ^qi(B) for different phase coherence length ℓ_ϕ at η_I = η_* = 0 (a), for different η_I at η_* = 0 (b), and for different η_I at finite η_* (c). The magnetic field B is applied along arbitrary directions. Parameters ℓ = 10 nm and ℓ_ϕ = 1000 nm in panels (b) and (c). (d) The diagrams show the difference between η_I and η_*, with η_I related to the intervalley scattering and η_* measuring the intervalley correlation of intravalley scattering. The dashed lines represent the correlation of two scattering processes. ν = ± is the valley index. Adapted from Ref. [24].