Fig. 3: Circular polarization resolved magneto-IR absorption spectra.
False color map of magneto-absorption at different energies for sample 1446 under the excitation of σ+ (a) and σ− (b) circularly polarized light. The dash lines are the calculated LL transitions that follow the selection rule Δn = +1, while the solid lines represent the Δn = −1 transitions. The low-lying transitions are numbered in the same sequence as in Fig. 2c, d. TLH denotes a weak transition from LH to HH LLs, and T* marks a magnetic field-independent spectral feature that we believe is not related to the band structure under this study. All measurements are performed at 5 K.
