Fig. 3: Valley phonon replicas of negatively charged dark trion.
From: Valley phonons and exciton complexes in a monolayer semiconductor
a Circular polarization resolved PL of the triplet PL peaks under electron-doped conditions. The photon energy of the spectrum is offset with respect to the negatively charged dark trion (D−). b Magneto PL of the triplets with σ− excitation and co-polarized detection. The photon energy of the spectrum is offset with respect to D− at zero field. c Gate-dependent PL with σ+ resonant pumping of the bright exciton and cross polarized (σ−) detection. The \(D_{K_1}^ -\) state on the electron doping side, which is 18 meV below D−, is clearly resolved. d Magneto PL at the gate voltage indicated by the orange arrow in c, with σ+ excitation and σ−detection.
