Volume 87, Number 1, July 2009
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||24 July 2009|
Polygrain icosahedral Al-Pd-Re quasicrystal as a granular electronic conductor
Moscow State Institute of Steel and Alloys - 119049 Moscow, Russian Federation
2 Russian Research Center “Kurchatov Institute” - 123182 Moscow, Russian Federation
Accepted: 23 June 2009
The mechanism of low-temperature electronic transport in polygrain samples of icosahedral Al-Pd-Re is analyzed by analogy with granular electronic systems. The intergranular tunneling and electrostatic energy (Coulomb blockade) are responsible for a specific behaviour of the electrical conductivity in polygrain samples of icosahedral Al-Pd-Re at low temperatures. Depending on the structural state of the sample, both factors may be important and the variable-range hopping regime, of Efros-Shklovskii's type, takes place. For the strong-coupling state the tunneling prevails, and the low-temperature variation of the electrical conductivity is dominated by the Coulomb-interaction and weak-localization corrections.
PACS: 72.15.-v – Electronic conduction in metals and alloys / 71.23.Ft – Quasicrystals
© EPLA, 2009
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