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.

Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots / Giuseppe, Maruccio; Martin, Janson; Andreas, Schramm; Christian, Meyer; Tomohiro, Matsui; Christian, Heyn; Wolfgang, Hansen; Roland, Wiesendanger; Rontani, Massimo; Molinari, Elisa. - In: NANO LETTERS. - ISSN 1530-6984. - ELETTRONICO. - 7:9(2007), pp. 2701-2706. [10.1021/nl071133m]

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

RONTANI, Massimo;MOLINARI, Elisa
2007

Abstract

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.
2007
7
9
2701
2706
Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots / Giuseppe, Maruccio; Martin, Janson; Andreas, Schramm; Christian, Meyer; Tomohiro, Matsui; Christian, Heyn; Wolfgang, Hansen; Roland, Wiesendanger; Rontani, Massimo; Molinari, Elisa. - In: NANO LETTERS. - ISSN 1530-6984. - ELETTRONICO. - 7:9(2007), pp. 2701-2706. [10.1021/nl071133m]
Giuseppe, Maruccio; Martin, Janson; Andreas, Schramm; Christian, Meyer; Tomohiro, Matsui; Christian, Heyn; Wolfgang, Hansen; Roland, Wiesendanger; Ron...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/737862
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