Fig. 3: Optical- and electric-field-induced transition from CLL trions to inter-layer excitons.
From: Correlated fermionic-bosonic insulating states in twisted hetero-trilayer semiconductors
a–c Excitation power-dependent photoluminescence (PL) spectra and their contour plots at applied voltage VTG-VBG of 0 V (a), 2 V (b), and 4 V (c) at 10 K from Device 2. The measured power-dependent PL spectra are fitted to Gaussian peaks. CLL trion: charge-layer-locked trion; IX: inter-layer exciton; IXX: inter-layer bi-exciton; IX+: charged inter-layer exciton; and CLL trion+: charged CLL trion. d PL intensity ratios of CLL trions (shown in red) and inter-layer excitons (shown in blue) as functions of excitation power. The PL intensity ratio is defined as the ratio of the integrated PL intensity of the CLL trion band or inter-layer exciton band to the total integrated PL intensity of these two bands. VTG-VBG corresponds to the out-of-plane electric field. e Schematic illustration of field-induced transitions from CLL trions to inter-layer excitons and bi-excitons.
