Abstract
We present a first-principles study of the electron conduction properties of single-row nanowires suspended between semi-infinite electrodes. The single-row sodium nanowires exhibit conductance oscillation and bunching of high electron density with two atom lengths in the channel density distribution. The relationship between the period of the conductance oscillation and the length of the bunches is interpreted using a simplified model. The difference in the penetration parameters between the incident Bloch wave and the reflected one inside the nanowire is closely related to the period of the conductance oscillation and the length of the bunches.
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