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Imaging the Electron Wave Function in Self-Assembled Quantum Dots

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Science  06 Oct 2000:
Vol. 290, Issue 5489, pp. 122-124
DOI: 10.1126/science.290.5489.122

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Abstract

Magnetotunneling spectroscopy is used as a noninvasive and nondestructive probe to produce two-dimensional spatial images of the probability density of an electron confined in a self-assembled semiconductor quantum dot. The technique exploits the effect of the classical Lorentz force on the motion of a tunneling electron and can be regarded as the momentum (k) space analog of scanning tunneling microscopy imaging. The images reveal the elliptical symmetry of the ground state and the characteristic lobes of the higher energy states.

  • * Permanent address: Institute of Microelectronics Technology, RAS, 142432 Chernogolovka, Russia.

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