“…That involving T 0 gives rise to transitions C and D, and that involving T * ± gives rise to transition E. It is worth noticing that the resonances corresponding to transitions B-E are non-degenerate, contrary to the spectrum expected from single-band models, and is consistent with optical measurements of positive trions, which reveal various resonances under the fundamental transition. [6,7,8] Note also that C and D resonances differ only in the final hole state, so their splitting provides a direct measurement of the p-shell splitting, ∆ 0 . Yet, this resonance may be difficult to observe experimentally because T 0 tends to thermalize quickly to the singlet ground state.…”