Correlation-enhanced Friedel oscillations in amorphous and quasicrystalline metals
| dc.creator | Kroha, Johann | |
| dc.date | 1997-07-29 | |
| dc.date.accessioned | 2026-07-07T09:11:58Z | |
| dc.date.available | 2026-07-07T09:11:58Z | |
| dc.description | The exponentially strong damping of the conventional Friedel oscillations at elevated temperature T as well as due to disorder poses a severe problem to the Hume-Rothery (HR) stabilization mechanism of amorphous and quasicrystalline alloys. We show that quantum correlations induced by electron-electron interactions in the presence of random impurity scattering can play an important role in stabilizing these systems: When there is strong backscattering off local ion clusters, the static electron density response chi(0,q) acquires a powerlaw divergence at q=2k_F even at T>0. This Fermi surface singularity leads to an enhancement as well as to a systematical phase shift of the Friedel oscillations, consistent with experiments. In addition, the spatial decay exponent is reduced, strongly supporting the validity of a HR-like mechanism at T>0. This effect may be accounted for in pseudopotential calculations through the local field factor. | |
| dc.description | 5 pages, LaTex, World Scientific book style (style file included), 3 Postscript figures included, to appear in Proceedings of the Int. Conf. Aperiodic'97 (Aug.97) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9707295 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9707295 | |
| dc.identifier | in Aperiodic97, M. de Boisieu J.-L. Verger-Gaugry and R. Currat eds., World Scientific (Singapore, 1999) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/151871 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Correlation-enhanced Friedel oscillations in amorphous and quasicrystalline metals | |
| dc.type | text |