Electronic structure of metal-semiconductor nanojunctions in gold CdSe nanodumbbells

D. Steiner, T. Mokari, U. Banin, O. Millo

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

The electronic properties of metal-semiconductor nanojunctions are investigated by scanning tunneling spectroscopy of gold-tipped CdSe rods. A gap similar to that in bare CdSe nanorods is observed near the nanodumbbell center, while subgap structure emerges near the metal-semiconductor nanocontact. This behavior is attributed to the formation of subgap interface states that vanish rapidly towards the center of the rod, consistent with theoretical predictions. These states lead also to modified Coulomb staircase, and in some cases to negative differential conductance, on the gold tips.

Original languageEnglish
Article number056805
JournalPhysical Review Letters
Volume95
Issue number5
DOIs
StatePublished - 29 Jul 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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