Electronic band dispersion and pseudogap in quasicrystals: Angular-resolved photoemission studies on icosahedral Al{sub 70}Pd{sub 21.5}Mn{sub 8.5}

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.4540· OSTI ID:277356

Wu, X; Kycia, S W; Olson, C G; Benning, P J; Goldman, A I; Lynch, D W ^[1]

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1. Department of Physics and Ames Laboratory, United States Department of Energy, Iowa State University, Ames, Iowa 50011 (United States)

Angular-resolved photoelectron spectra from the fivefold surface of single-grain icosahedral Al{sub 70}Pd{sub 21.5}Mn{sub 8.5} 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. {copyright} {ital 1995 The American Physical Society.}

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 277356
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ALUMINIUM BASE ALLOYS
ANGULAR DISTRIBUTION
BAND STRUCTURE
ELECTRON DIFFRACTION
ELECTRONIC STRUCTURE
ENERGY GAP
MANGANESE ALLOYS
PALLADIUM ALLOYS
PHOTOEMISSION
QUASICRYSTALS
TERNARY ALLOY SYSTEMS