Extended Data Fig. 4: Reflectivity spectra of quasicrystal D2 as a function of doping with different E-fields.
From: Field-tunable valley coupling in a dodecagonal semiconductor quasicrystal
(a) The reflection spectra are plotted as a function of doping density in the absence of an electric field. Negative trion \({T}_{t,b}^{-}\) and positive trion \({T}_{t,b}^{+}\) are marked by black dashed lines. The blue-shifted exciton Xt,b is marked as a white dashed line. The trion signals come from both layers. (b) Reflection spectra are displayed as a function of doping density at a constant electric field of E=0.03 V nm−1 which below the critical hybridization E field (Ec). Negative trion \({T}_{b}^{-}\) and positive trion \({T}_{t}^{+}\) are marked by black dashed lines. The blue-shifted exciton Xt is marked by the white dashed line. The doped holes reside in the top layer below doping concentration − 5 Ă— 1012cm−2 and in both layers above it. The positive trion signal from both layers is marked as \({T}_{t,b}^{+}\).
