Approach to steady state transport in nanoscale conductors

Details Approach to steady state transport in nanoscale conductors Approach to steady state transport in nanoscale conductors

2005-04-21

arxiv.org/abs/cond-mat/0504538v3

Nano Lett. 5, 2569 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages in REVTEX4, 4 epsf figures

Scientific paper

10.1021/nl0520157

We show, using a tight-binding model and time-dependent density-functional theory, that a quasi-steady state current can be established dynamically in a finite nanoscale junction without any inelastic effects. This is simply due to the geometrical constriction experienced by the electron wavepackets as they propagate through the junction. We also show that in this closed non-equilibrium system two local electron occupation functions can be defined on each side of the nanojunction which approach Fermi distributions with increasing number of atoms in the electrodes. The resultant conductance and current-voltage characteristics at quasi-steady state are in agreement with those calculated within the static scattering approach.

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