Abstract, Sino-German Workshop, Hangzhou, 2007

Signal transport and finite bias conductance in and through correlated nanostructures

Peter Schmitteckert

Institut fuer Theorie der Kondensierten Materie, Universitaet Karlsruhe, 76128 Karlsruhe

In this work we apply the Real-Time Density-Matrix-Renormalization Group Method to calculate the differential conductance of an interacting nano-structure attached to one-dimensional, noninteracting leads.

We first discuss the time evolution of wave packets within the DMRG. Then we explain our approach to extract the differential conductance from wave packet dynamics and discuss the difficulties arising from finite size effects, and how they can be addressed.

Finally, we present results for the linear conductance vs. an applied gate voltage and the non-equilibrium differential conductance vs. sourcedrain voltage for weakly and strongly interacting nano-structures.

[1] Guenter Schneider and Peter Schmitteckert, Conductance in strongly correlated 1D systems: Real-Time Dynamics in DMRG, Cond-mat/0601389

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