標題: Counting statistics in nanoscale junctions
作者: Liu, Yu-Shen
Chen, Yu-Chang
電子物理學系
Department of Electrophysics
公開日期: 3-一月-2011
摘要: 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 pi* orbital near the Fermi levels. The third-order Fano factor and the conductance are positively correlated.
URI: http://dx.doi.org/10.1103/PhysRevB.83.035401
http://hdl.handle.net/11536/25902
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.83.035401
期刊: PHYSICAL REVIEW B
Volume: 83
Issue: 3
結束頁: 
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