Transport properties of strongly correlated electrons in quantum dots using a simple circuit model

Details Transport properties of strongly correlated electrons in quantum dots using a simple circuit model Transport properties of strongly correlated electrons in quantum dots using a simple circuit model

2005-05-02

arxiv.org/abs/cond-mat/0505037v1

PRL 96, 066802 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

Numerical calculations are shown to reproduce the main results of recent experiments involving nonlocal spin control in nanostructures (N. J. Craig et al., Science 304, 565 (2004)). In particular, the splitting of the zero-bias-peak discovered experimentally is clearly observed in our studies. To understand these results, a simple "circuit model" is introduced and shown to provide a good qualitative description of the experiments. The main idea is that the splitting originates in a Fano anti-resonance, which is caused by having one quantum dot side-connected in relation to the current's path. This scenario provides an explanation of Craig et al.'s results that is alternative to the RKKY proposal, which is here also addressed.

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