Scatter Plot from Scientific Research

Calculated series of eigenenergies E n relative to the ground-state energy E 1 . The degeneracy of the 2 p states is lifted resulting in a splitting of ~13 meV. The arrows indicate the transition energy from the 1 s state (horizontal dashed lines) to the energetically higher-lying 2 p a (orange) and 2 p b (blue) states. Insets: probability densities | Ψ | 2 for 1 s (grey box), 2 p a (orange box) and 2 p b (blue box) orbitals of a quasi-1D exciton derived from the anisotropic effective mass and dielectric screening (compare Fig. 1b,c ; Methods ).

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