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Correlation-enhanced Friedel oscillations in amorphous alloys and quasicrystals

Johann Kroha
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Abstract

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 $χ(0,q)$ 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.

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Johann Kroha. 1998-10-07. Correlation-enhanced Friedel oscillations in amorphous alloys and quasicrystals. https://doi.org/10.1016/s0022-3093(99)00194-5

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