PhysRevB.85.195459.pdf (1.69 MB)
Current eigenmodes and dephasing in nanoscopic quantum networks
journal contribution
posted on 2013-11-08, 00:00 authored by Tankut Can, Hui Dai, Dirk K. MorrUsing the nonequilibrium Keldysh Green’s function formalism, we show that the nonequilibrium charge
transport in nanoscopic quantum networks takes place via current eigenmodes that possess characteristic spatial
patterns.We identify the microscopic relation between the current patterns and the network’s electronic structure
and topology and demonstrate that these patterns can be selected via gating or constrictions, providing new
venues for manipulating charge transport at the nanoscale. Finally, decreasing the dephasing time leads to a
smooth evolution of the current patterns from those of a ballistic quantum network to those of a classical resistor
network.
History
Publisher Statement
© 2012 by American Physical Society , Physical Review B. The original version is available through American Physical Society at DOI: 10.1103/PhysRevB.85.195459Publisher
American Physical SocietyLanguage
- en_US