Fig. 6: Vibronic excitations associated with charge state transitions of CRI.
From: Spin-dependent vibronic response of a carbon radical ion in two-dimensional WS2

a Electron attachment to the unoccupied defect state for CS on monolayer WS2. dI/dV measurement (black dots) and three-mode electron–phonon coupling model (orange line). b Hole attachment to the occupied defect state for CS on monolayer WS2. dI/dV measurement (black dots) and four-mode electron–phonon coupling model (blue line). c Electron attachment for CS on bilayer WS2. dI/dV measurement (black dots) and three-mode electron–phonon coupling model (orange line). d Hole attachment for CS on bilayer WS2. dI/dV measurement (black dots) and four-mode electron–phonon coupling model (blue line). Fit parameters are given in Table 1.