Time dependent behavior of a localized electron at a heterojunction boundary of graphene

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We develop a finite-difference time-domain (FDTD) method for simulating the dynamics of graphene electrons, denoted GraFDTD. We then use GraFDTD to study the temporal behavior of a single localized electron wave packet, showing that it exhibits optical-like dynamics including the Goos-Haumlnchen effect [F. Goos and H. Haumlnchen, Ann. Phys. 436, 333 (1947)] at a heterojunction, but the behavior is quantitatively different than for electromagnetic waves. This suggests issues that must be addressed in designing graphene-based electronic devices analogous to optical devices. GraFDTD should be useful for studying such complex time-dependent behavior of a quasiparticle in graphene. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3454909]
Publisher
AMER INST PHYSICS
Issue Date
2010-07
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.97, no.4

ISSN
0003-6951
URI
http://hdl.handle.net/10203/175112
Appears in Collection
EE-Journal Papers(저널논문)EEW-Journal Papers(저널논문)
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