Quantum interference effects in graphene
Speaker:
Konstantin Kechedzhi, Lancaster University
Date & Time:
March 31, 2008 - 4:45pm
Location:
Serin E385 | Quantum interference effects in graphene Physics and Astronomy |
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| Konstantin Kechedzhi, Lancaster University 4:45 PM, Serin E385 Graphene is a two-dimensional gapless two-valley semiconductor with a peculiar electronic spectrum. In particular, the electronic Fermi line in each of its valleys has a strong p to -p asymmetry due to trigonal warping, which leads to the Dyakonov-Perel-like relaxation of chiral electron states and therefore suppresses the weak localization effect. The theoretical analysis showed that the weak localization in monolayer and bilayer graphene may be present only in devices with pronounced inter-valley scattering. The weak localization magnetoresistance obtained in the analysis showed good agreement with recent measurements by several experimental groups. |