Counting statistics in nanoscale junctions

Yu Shen Liu*, Yu-Chang Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We present first-principles calculations for moments of the current up to the third order in atomic-scale junctions. The quantum correlations of the current are calculated using the current operator in terms of the wave functions obtained self-consistently within the static density-functional theory. We investigate the relationships of the conductance, the second, and the third moment of the current for carbon atom chains of various lengths bridging two metal electrodes in the linear and nonlinear regimes. The conductance, the second-, and the third-order Fano factors exhibit odd-even oscillation with the number of carbon atoms due to the full and half filled π⊃* orbital near the Fermi levels. The third-order Fano factor and the conductance are positively correlated.

Original languageEnglish
Article number035401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number3
DOIs
StatePublished - 3 Jan 2011

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