Transport through a small interacting system

Abstract EN

We study the effect of nonlinear interaction, and finite coupling, Vq, to the leads on the transmission properties of a finite ID chain of N atoms.

The two-probe dc conductance, G, through a finite interacting chain connected to reservoirs is studied both in the T = 0 and T * 0 cases.

At T= 0 we observe that, for E = 0, perfect transmission occurs for odd values of N while for even N, the transmission reaches its minimum value.

This results in an even-odd oscillatory behavior which becomes suppressed at higher temperatures.

The two-probe conductance is also seen to be drastically reduced when the strength of the nonlinear interaction, U, is of the order of the inter-site coupling.