  Tunneling spectroscopy reveals evidence for interlayer electron-hole
correlations in quantum Hall bilayer two-dimensional electron systems at layer
separations near, but above, the transition to the incompressible exciton
condensate at total Landau level filling $\nu_T=1$. These correlations are
manifested by a non-linear suppression of the Coulomb pseudogap which inhibits
low energy interlayer tunneling in weakly-coupled bilayers. The pseudogap
suppression is strongest at $\nu_T=1$ and grows rapidly as the critical layer
separation for exciton condensation is approached from above.
