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Fine structure in the electronic density of states of Al-Ni-Co decagonal quasicrystal from ultrafast time-resolved optical reflectivity
- Source :
- T. Mertelj et al., Phys. Rev. Lett. 102, 086405 (2009)
- Publication Year :
- 2008
-
Abstract
- We measured the temperature and fluence dependence of the time-resolved photoinduced optical reflectivity in a decagonal Al_{71.9}Ni_{11.1}Co_{17.0} quasicrystal. We find no evidence for the relaxation of a hot thermalized electron gas as observed in metals. Instead, a quick diffusion of the hot nonthermal carries ~40 nm into the bulk is detected enhanced by the presence of a broad ~1 eV pseudogap. From the relaxation dynamics we find an evidence for the presence of a fine structure in the electronic density of states around ~13 meV from the Fermi energy. The structure is related to a weak bottleneck for the carrier relaxation observed at low temperatures.<br />Comment: The sample composition was corrected
- Subjects :
- Condensed Matter - Other Condensed Matter
Subjects
Details
- Database :
- arXiv
- Journal :
- T. Mertelj et al., Phys. Rev. Lett. 102, 086405 (2009)
- Publication Type :
- Report
- Accession number :
- edsarx.0809.0764
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.102.086405