Magnetically induced chessboard pattern in the conductance of a Kondo quantum dot

Details Magnetically induced chessboard pattern in the conductance of a Kondo quantum dot Magnetically induced chessboard pattern in the conductance of a Kondo quantum dot

2003-05-09

arxiv.org/abs/cond-mat/0305202v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 color figures

Scientific paper

10.1103/PhysRevLett.91.046601

We quantitatively describe the main features of the magnetically induced conductance modulation of a Kondo quantum dot -- or chessboard pattern -- in terms of a constant-interaction double quantum dot model. We show that the analogy with a double dot holds down to remarkably low magnetic fields. The analysis is extended by full 3D spin density functional calculations. Introducing an effective Kondo coupling parameter, the chessboard pattern is self-consistently computed as a function of magnetic field and electron number, which enables us to quantitatively explain our experimental data.

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