Imaging and Spectroscopy of Artificial-Atom States in Core/Shell Nanocrystal Quantum Dots
Journal Article
·
· Physical Review Letters
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.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204683
- Journal Information:
- Physical Review Letters, Vol. 86, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.86.5751; Othernumber: PRLTAO000086000025005751000001; 036124PRL; PBD: 18 Jun 2001; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photogenerated carriers transport behaviors in L-cysteine capped ZnSe core-shell quantum dots
Size-dependent tunneling and optical spectroscopy of InAs nanocrystal quantum dots
Process-Dependent Properties in Colloidally Synthesized “Giant” Core/Shell Nanocrystal Quantum Dots
Journal Article
·
Sun Feb 07 00:00:00 EST 2016
· Journal of Applied Physics
·
OSTI ID:40204683
+3 more
Size-dependent tunneling and optical spectroscopy of InAs nanocrystal quantum dots
Journal Article
·
Wed Mar 01 00:00:00 EST 2000
· Journal of Low Temperature Physics
·
OSTI ID:40204683
+2 more
Process-Dependent Properties in Colloidally Synthesized “Giant” Core/Shell Nanocrystal Quantum Dots
Conference
·
Thu Jun 07 00:00:00 EDT 2012
·
OSTI ID:40204683
+4 more