Limit-Cycles and Chaos in the Current Through a Quantum Dot

Details Limit-Cycles and Chaos in the Current Through a Quantum Dot Limit-Cycles and Chaos in the Current Through a Quantum Dot

2011-04-20

arxiv.org/abs/1104.3995v2

Phys. Rev. B 85, 045301 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 8 figures. Published version

Scientific paper

10.1103/PhysRevB.85.045301

We investigate non-linear magneto-transport through a single level quantum dot coupled to ferromagnetic leads, where the electron spin is coupled to a large, external (pseudo)spin via an anisotropic exchange interaction. We find regimes where the average current through the dot displays self-sustained oscillations that reflect the limit-cycles and chaos and map the dependence of this behaviour on magnetic field strength and the tunnel coupling to the external leads.

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