Extended Data Fig. 2: Exciton wavefunction within the effective-mass approximation.
From: A monolayer transition-metal dichalcogenide as a topological excitonic insulator
Contour plot of the exciton wavefunction square modulus in k space within the electron–hole centre-of-mass frame. This is the lowest-energy exciton responsible for the instability that drives the transition into the QSHX phase. The plot compares well with its first-principles counterpart (Fig. 2b).
