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Magneto‐Tunnelling Spectroscopy for Spatial Mapping of Orbital Wavefunctions of the Ground and Excited Electronic States in Self‐Assembled Quantum Dots
Author(s) -
Levin A.,
Vdovin E.E.,
Patanè A.,
Eaves L.,
Main P.C.,
Khanin Yu.N.,
Dubrovskii Yu.V.,
Henini M.,
Hill G.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(200104)224:3<715::aid-pssb715>3.0.co;2-l
Subject(s) - excited state , quantum tunnelling , wave function , quantum dot , spectroscopy , physics , condensed matter physics , quantum , electronic structure , ground state , atomic physics , quantum mechanics
We present an experimental study of electron wavefunctions in InAs/GaAs self‐assembled quantum dots (QDs). Magneto‐tunnelling spectroscopy is employed as a non‐invasive probe to produce two‐dimensional images of the probability density of an electron confined in a quantum dot. The images reveal clearly the elliptical symmetry of the ground state and the characteristic lobes of the higher energy states of the dots. We use the technique to compare the symmetry properties of the electron wavefunctions in QDs grown on (100)‐ and (311)B‐oriented GaAs substrates.