Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-09-04
T. Mertelj et al., Phys. Rev. Lett. 102, 086405 (2009)
Physics
Condensed Matter
Other Condensed Matter
The sample composition was corrected
Scientific paper
10.1103/PhysRevLett.102.086405
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.
Dolinsek J.
Fisher Ian R.
Kabanov Vladimir V.
Mertelj T.
Mihailovic Dragan
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