Plasmons in icosahedral quasicrystals: An EELS investigation
LEPES-CNRS, 25 avenue des Martyrs, BP 166, 38042 Grenoble Cedex 9, France
2 LTPCM, 1130 rue de la piscine, Domaine Universitaire, BP 75, 38402 Saint Martin d'Hères Cedex, France
Revised: 16 July 1999
Published online: 15 February 2000
We present the results of an electron energy loss spectroscopy (EELS) investigation of the icosahedral quasicrystals i-Al-Cu-Fe, i-Al-Pd-Mn and i-Al-Pd-Re. The spectra of the three systems studied are very similar. Their main contribution comes from a broad plasmon like peak, which can be interpreted as an "" electron plasmon damped by "d" electron interband transitions. We show that it is similar to those found in other simple crystalline aluminum-transition metal alloys, so that no specificity related to the quasicrystalline order of the alloys dominates.
PACS: 71.23.Ft – Quasicrystals / 71.45.Gm – Exchange, correlations, dielectric and magnetic functions, plasmons
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000