Bibliographic Details
| Title: |
Electronic structure investigations of quasicrystals |
| Authors: |
Rotenberg, E.1 erotenberg@lbl.gov, Theis, W.2, Horn, K.3 |
| Source: |
Progress in Surface Science. Aug2004, Vol. 75 Issue 3-8, p237-253. 17p. |
| Subjects: |
Crystals, Electron emission, Quasicrystals, Photoemission |
| Abstract: |
We present a review of the determination of density of states (DOS) of quasicrystals using valence band photoemission spectroscopy. The absence of fine or spiky structure in the angle-integrated DOS of quasicrystals suggests the possibility of delocalized electronic states. These were confirmed with angle-resolved photoemission studies, which clearly establish the presence of dispersing features attributed to momentum-dependent bandstructure. Such dispersing states are observed not only for deeper-lying sp states, but also for d-derived bands near the Fermi level. Data from three different high symmetry surfaces of decagonal Al–Ni–Co, an ideal model system, are presented. We find that only a few dominant reciprocal lattice vectors are sufficient to describe the quasiperiodic potential, and the implications for electronic properties are discussed. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
