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Bulk Electronic Structure of Quasicrystals
Physical Review Letters
  • J. Nayak, UGC-DAE Consortium for Scientific Research
  • M. Maniraj, UGC-DAE Consortium for Scientific Research
  • Abhishek Rai, UGC-DAE Consortium for Scientific Research
  • Sanjay Singh, UGC-DAE Consortium for Scientific Research
  • Parasmani Rajput, European Synchrotron Radiation Facility
  • A. Gloskovskii, Duetsches Elektronen-Synchrotron DESY
  • J. Zegenhagen, European Synchrotron Radiation Facility
  • Deborah L. Schlagel, Iowa State University
  • Thomas A. Lograsso, Iowa State University
  • K. Horn, Fritz-Haber-Institut der Max-Planck-Gesellschaft
  • S. R. Barman, UGC-DAE Consortium for Scientific Research
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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.

This article is from Physical Review Letters 109 (2012): 216403, doi:10.1103/PhysRevLett.109.216403.

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American Physical Society
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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
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