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TT: Fachverband Tiefe Temperaturen

TT 28: Transport - Poster Session

TT 28.33: Poster

Thursday, March 29, 2007, 14:00–17:45, Poster A

Anomalous stability diagram in double-walled carbon nanotube quantum — •Shidong Wang, Emiliano Pallecchi, Christoph Strunk, and Milena Grifoni — Institut fuer Theoretische Physik, Universität Regensburg

We investigate a quantum dot system formed by a double-walled carbon nanotube in the Coulomb blockade regime. We show that the system can be mapped into a capacitively connected double quantum dot system. The two quantum dots are connected in parallel and have different charging energies and different energy-dependent couplings with leads. We calculate the stability diagram of this system by using the master equation approach. The diagram shows the superposition of two sets of diamond patterns with different size, as it has been recently observed in transport experiments across multi-walled carbon nanotubes.