Bulk Electronic Structure of Quasicrystals
| Title | Bulk Electronic Structure of Quasicrystals |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Nayak J, Maniraj M, Rai A, Singh S, Rajput P, Gloskovskii A, Zegenhagen J, Schlagel DL, Lograsso TA, Horn K, Barman SR |
| Journal Title | Physical Review Letters |
| Volume | 109 |
| Pages | 216403 |
| Date Published | 11 |
| Type of Article | Article |
| ISBN Number | 0031-9007 |
| Accession Number | WOS:000311284200012 |
| Keywords | alloys, density-of-states, dispersion, phase, PHOTOEMISSION-SPECTROSCOPY, ray photoelectron-spectroscopy, resolution, resolved photoemission, surface |
| 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 E-F indicating that it is close to the metal-insulator phase boundary. |
| URL | <Go to ISI>://WOS:000311284200012 |
| DOI | 10.1103/PhysRevLett.109.216403 |
| Alternate Journal | Phys. Rev. Lett. |
