  We show that quantum correlations induced by electron-electron interactions
in the presence of random impurity scattering can play an important role in the
thermal stabilization of amorphous Hume-Rothery systems: When there is strong
backscattering off local, concentrical ion clusters, the static electron
density response $\chi (0,q)$ acquires a powerlaw divergence at $q=2k_F$ even
at elevated temperature. This leads to an enhancement as well as to a
systematical phase shift of the Friedel oscillations, both consistent with
experiments. The possible importance of this effect in icosahedral
quasicrystals is discussed.
