2001/04/15 by Oded Millo, David Katz, Y. Charles Cao +2 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Atomic physics #Chalcogenide Semiconductor Thin Films #Condensed matter physics #Conduction band #Core (optical fiber) #Envelope (radar) #Materials science #Molecular physics #Nanocrystal #Nanotechnology #Optics #Physics #Quantum Dots Synthesis And Properties #Quantum dot #Quantum mechanics #Quantum tunnelling #Scanning tunneling microscope #Scanning tunneling spectroscopy #Semiconductor Quantum Structures and Devices #Shell (structure) #Spectroscopy #Wave function #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.86.5751
to be published in Physical Review Letters
arxiv created 2001/04/15 · openalex publication_date 2001/06/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Current imaging scanning tunneling microscopy is used to observe the electronic wave functions in InAs/ZnSe core/shell nanocrystals. Images taken at a bias corresponding to the s conduction band state show that it is localized in the central core region, while images at higher bias probing the p state reveal that it extends to the shell. This is supported by optical and tunneling spectroscopy data demonstrating that the s-p gap closes upon shell growth. Shapes of the current images resemble atomlike envelope wave functions of the quantum dot calculated within a particle in a box model.