Resonant tunnelling in interacting 1D systems with an AC modulated gate

Details Resonant tunnelling in interacting 1D systems with an AC modulated gate Resonant tunnelling in interacting 1D systems with an AC modulated gate

2004-02-12

arxiv.org/abs/cond-mat/0402332v1

Solid State Comm. 131, 631 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 3 figures (eps files)

Scientific paper

10.1016/j.ssc.2004.05.021

We present an analysis of transport properties of a system consisting of two half-infinite interacting one-dimensional wires connected to a single fermionic site, the energy of which is subject to a periodic time modulation. Using the properties of the exactly solvable Toulouse point we derive an integral equation for the localised level Keldysh Green's function which governs the behaviour of the linear conductance. We investigate this equation numerically and analytically in various limits. The period-averaged conductance G displays a surprisingly rich behaviour depending on the parameters of the system. The most prominent feature is the emergence of an intermediate temperature regime at low frequencies, where G is proportional to the line width of the respective static conductance saturating at a non-universal frequency dependent value at lower temperatures.

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