Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots

Details Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots

2007-07-31

arxiv.org/abs/0707.4613v1

Nano Letters Vol. 7, No. 9, pages 2701-2706 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

PDF file, 20 pages, 6 color figures

Scientific paper

10.1021/nl071133m

We investigate correlation effects in the regime of a few electrons in uncapped InAs quantum dots by tunneling spectroscopy and wave function (WF) mapping at high tunneling currents where electron-electron interactions become relevant. Four clearly resolved states are found, whose approximate symmetries are roughly s and p, in order of increasing energy. Because the major axes of the p-like states coincide, the WF sequence is inconsistent with the imaging of independent-electron orbitals. The results are explained in terms of many-body tunneling theory, by comparing measured maps with those calculated by taking correlation effects into account.

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