Prediction of the capacitance lineshape in two-channel quantum dots

Details Prediction of the capacitance lineshape in two-channel quantum dots Prediction of the capacitance lineshape in two-channel quantum dots

2004-12-09

arxiv.org/abs/cond-mat/0412213v1

Phys. Rev. Lett. 95, 036801 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.95.036801

We propose a set-up to realize two-channel Kondo physics using quantum dots. We discuss how the charge fluctuations on a small dot can be accessed by using a system of two single electron transistors arranged in parallel. We derive a microscopic Hamiltonian description of the set-up that allows us to make connection with the two-channel Anderson model (of extended use in the context of heavy-Fermion systems) and in turn make detailed predictions for the differential capacitance of the dot. We find that its lineshape, which we determined precisely, shows a robust behavior that should be experimentally verifiable.

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