Extended Data Fig. 3: Localization dependence of the internal excitonic structure.
a, Calculated exciton series for different electron–hole wavefunction localization across 1, 2 or 3 layers. Energies are relative to the ground state energy of the single-layer solution. b, Transition energy between the 1s ground state and the 2pb state (5th eigenstate) as a function of the electron–hole wavefunction localization along the crystal c-axis. To relate the localization length to the number of layers, we consider a layer thickness of 6 Å as well as an interlayer separation of 2 Å, consistent with relaxed lattice geometries from first-principles calculations26,27.
