Article
Bulk Electronic Structure of Quasicrystals
Physical Review Letters
Document Type
Article
Disciplines
Publication Date
11-20-2012
DOI
10.1103/PhysRevLett.109.216403
Abstract
We use hard x-ray photoemission to resolve a controversial issue regarding the mechanism for the formation of quasicrystalline solids, i.e., the existence of a pseudogap at the Fermi level. Our data from icosahedral fivefold Al-Pd-Mn and Al-Cu-Fe quasicrystals demonstrate the presence of a pseudogap, which is not observed in surface sensitive low energy photoemission because the spectrum is affected by a metallic phase near the surface. In contrast to Al-Pd-Mn, we find that in Al-Cu-Fe the pseudogap is fully formed; i.e., the density of states reaches zero at EF indicating that it is close to the metal-insulator phase boundary.
Copyright Owner
American Physical Society
Copyright Date
2012
Language
en
File Format
application/pdf
Citation Information
J. Nayak, M. Maniraj, Abhishek Rai, Sanjay Singh, et al.. "Bulk Electronic Structure of Quasicrystals" Physical Review Letters Vol. 109 Iss. 21 (2012) p. 216403 Available at: http://works.bepress.com/thomas_lograsso/23/
This article is from Physical Review Letters 109 (2012): 216403, doi:10.1103/PhysRevLett.109.216403.