Electronic Band Dispersion and Pseudogap in Quasicrystals: Angular-Resolved Photoemission Studies on Icosahedral
- 11 December 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (24) , 4540-4543
- https://doi.org/10.1103/physrevlett.75.4540
Abstract
Angular-resolved photoelectron spectra from the fivefold surface of single-grain icosahedral 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.
Keywords
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