The Interplay of Spin and Charge Channels in Zero Dimensional Systems

Details The Interplay of Spin and Charge Channels in Zero Dimensional Systems The Interplay of Spin and Charge Channels in Zero Dimensional Systems

2005-04-28

arxiv.org/abs/cond-mat/0504751v1

Phys.Rev.Lett. 96, 066805 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4.5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.96.066805

We present a full fledged quantum mechanical treatment of the interplay between the charge and the spin zero-mode interactions in quantum dots. Quantum fluctuations of the spin-mode suppress the Coulomb blockade and give rise to non-monotonic behavior near this point. They also greatly enhance the dynamic spin susceptibility. Transverse fluctuations become important as one approaches the Stoner instability. The non-perturbative effects of zero-mode interaction are described in terms of charge (U(1)) and spin (SU(2)) gauge bosons.

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