We show both theoretically and experimentally that scanning tunneling spectroscopy (STS) images of semiconductor quantum dots may display clear signatures of electron-electron correlation. We apply many-body tunneling theory to a realistic model, which fully takes into account correlation effects and dot anisotropy. Comparing measured STS images of freestanding InAs quantum dots with those calculated by the full configuration interaction method, we explain the wave-function sequence in terms of images of one- and two-electron states. The STS map corresponding to double charging is significantly distorted by electron correlation with respect to the noninteracting case.

Imaging correlated wave functions of few-electron quantum dots: theory and STS experiments / Rontani, Massimo; Molinari, Elisa; Mariuccio, G; Janson, M; Schramm, A; Meyer, C; Matsui, T; Heyn, C; Hansen, W; AND WIESENDANGER, R.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - STAMPA. - 101:(2007), pp. 081714-081714.

Imaging correlated wave functions of few-electron quantum dots: theory and STS experiments

RONTANI, Massimo;MOLINARI, Elisa;
2007

Abstract

We show both theoretically and experimentally that scanning tunneling spectroscopy (STS) images of semiconductor quantum dots may display clear signatures of electron-electron correlation. We apply many-body tunneling theory to a realistic model, which fully takes into account correlation effects and dot anisotropy. Comparing measured STS images of freestanding InAs quantum dots with those calculated by the full configuration interaction method, we explain the wave-function sequence in terms of images of one- and two-electron states. The STS map corresponding to double charging is significantly distorted by electron correlation with respect to the noninteracting case.
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Imaging correlated wave functions of few-electron quantum dots: theory and STS experiments / Rontani, Massimo; Molinari, Elisa; Mariuccio, G; Janson, M; Schramm, A; Meyer, C; Matsui, T; Heyn, C; Hansen, W; AND WIESENDANGER, R.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - STAMPA. - 101:(2007), pp. 081714-081714.
Rontani, Massimo; Molinari, Elisa; Mariuccio, G; Janson, M; Schramm, A; Meyer, C; Matsui, T; Heyn, C; Hansen, W; AND WIESENDANGER, R.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/421414
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