Junction symmetry effects in resonant tunneling through InAs nanocrystal quantum dots

David Katz, Shi-Hai Kan, Uri Banin and Oded Millo

Physica A: Statistical Mechanics and its Applications, 2001, vol. 302, issue 1, 328-334

Abstract: Tunneling spectra of InAs nanocrystals anchored to gold via linker molecules or deposited onto graphite were measured using scanning tunneling microscopy, in a double-barrier tunnel-junction configuration. The effects of the junction symmetry on the tunneling spectra, due to both the voltage division and the tunneling rates, are studied experimentally and modeled theoretically. We observe resonant tunneling through nanocrystal states without charging when the tip is retracted from nanocrystals deposited on graphite. Charging is regained upon reducing the tip-nanocrystal distance, making the junctions more symmetric. In contrast, charging-free resonant tunneling was not achieved for the nanocrystal/linker-molecule/Au system.

Keywords: Scanning tunneling microscopy (or STM); Tunnelling spectroscopy; Semiconductor nanocrystals; Quantum dots; Single electron tunnelling (search for similar items in EconPapers)
Date: 2001
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378437101004502
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:302:y:2001:i:1:p:328-334

DOI: 10.1016/S0378-4371(01)00450-2

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().