Fig. 2: Out-of-plane magnetic field B⊥dependent photoluminescence of defect luminescence Q1.
From: Spin-defect characteristics of single sulfur vacancies in monolayer MoS2
a Low-temperature photoluminescence (PL) spectra of defect luminescence Q1 at zero out-of-plane magnetic field (B⊥) for σ+(red) and σ−(blue) polarized detection. The zero-phonon line (ZPL) of Q1 occurs at 1.752 eV with a red-shifted (30 meV) local phonon mode (LPM, see inset). b PL versus B⊥for Q1. The left (right) panel shows the σ−(σ+) polarized signal. The spectra were normalized to their maximum intensity. c The fitted position of the ZPL of Q1 shows a diamagnetic shift of 1.0 ± 0.1 μeV T−2. d Valley Zeeman splitting of Q1 versus B⊥. The black dashed line shows a fit to the data with a Zeeman splitting of μ⊥,Q1 = + 0.1 ± 0.1μB. e Bandstructure of MoS2 with a periodic sulfur-vacancy extracted from DFT calculations. The color code denotes the total magnetic moment at each k-point. f Density of states (DOS) plot of the Brillouin zone, showing energetically narrow densities at the defect levels. g Illustration of the two spin-split electron states in the \(K/{K}^{{\prime} }\) valley and possible optical transitions of Q1 for zero and finite magnetic field.
