Ill-Contact Effects of d-Orbital Channels in Nanometer-Scale Conductor
Abstract
Electronic current in a nanometer-size rod is theoretically investigated by an eigen-channel decomposition method in nonequilibrium Green's function formalism. Physical properties, such as the local density of electrons and local current, are decomposed into contributions of eigen-channels. We observe that the evanescent modes and nonlinear conductance are enhanced in d-orbital systems, and the structure of the transmission function, local current density, and penetration depth are discussed. The two effects of the ill-contact at electrodes in d-orbital systems, evanescent modes and the nonlinearity of conductance, are regarded as originating in the peak structure of the transmission function of eigen-channels in the energy region between chemical potentials of left and right lead wires.
Keywords
Cite
@article{arxiv.0809.3078,
title = {Ill-Contact Effects of d-Orbital Channels in Nanometer-Scale Conductor},
author = {Hiroshi Shinaoka and Takeo Hoshi and Takeo Fujiwara},
journal= {arXiv preprint arXiv:0809.3078},
year = {2009}
}
Comments
8 pages, 7 figures