Electronic Band Dispersion and Pseudogap in Quasicrystals: Angular-Resolved Photoemission Studies on Icosahedral Al70Pd21.5Mn8.5

Date
1995-12-01
Authors
Goldman, Alan
Wu, X.
Kycia, Stefan
Olson, C. G.
Lynch, David
Benning, P. J.
Goldman, Alan
Lynch, David
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Physics and Astronomy
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Physics and Astronomy
Abstract

Angular-resolved photoelectron spectra from the fivefold surface of single-grain icosahedral Al70Pd21.5Mn8.5 exhibit a quasiperiodic dispersion of 300 meV at 2.3 eV binding energy. Low energy electron diffraction studies confirm quasicrystalline order at the surface. A distinct pseudogap feature is observed with a density of states near the Fermi level decreasing as a square-root power law.

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This article is from Physical Review Letters 75 (1995): 4540, doi:10.1103/PhysRevLett.75.4540. Posted with permission.

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