Fig. 4: Electron–hole pairing and conductivity.
From: Evidence for equilibrium exciton condensation in monolayer WTe2
a, Total electron (n) and hole (p) densities calculated for T = 100 K using the single-particle density of states D(E) shown in Fig. 3c. The difference is n − p = ng and the shaded area min(n,p) is the maximum possible density nx of non-interacting equilibrium excitons. b, Measured conductance of device MW12 (black solid line) at 100 K compared with the calculated conductance for nx = min(n,p) (red dashed line) and for no excitons, nx = 0 (blue dotted line). c, As in b but at 150 K. The additional green dash-dotted line was obtained by allowing nx to vary in kinetic equilibrium (see text).
