Field emission properties of carbon nanowires from ab initio calculations

M Bianchetti, P Buonsante, F Ginelli, A Lorenzoni, H E Roman, R A Broglia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The field emission (FE) characteristics of linear carbon chains, relevant for understanding FE properties of complex carbon-based nanostructures, are studied by means of self-consistent density functional calculations in the presence of a constant electric held, making use of pseudopotentials and the local density approximation (LDA). The transmission coefficient for electron tunneling through the LDA potential barrier to the vacuum is obtained within the WKB approximation. It is found that chain polarization has remarkable effects on the emission properties, yielding currents of the order of 1 mu A for a chain of 9 atoms under standard bias conditions. Such carbon chains may thus be seen as the atomic scale realization of metallic nanowires.

Original languageEnglish
Title of host publicationELECTRONIC PROPERTIES OF NOVEL MATERIALS - SCIENCE AND TECHNOLOGY OF MOLECULAR NANOSTRUCTURES
EditorsH Kuzmany, J Fink, M Mehring, S Roth
Place of PublicationMELVILLE
PublisherAMER INST PHYSICS
Pages448-451
Number of pages4
ISBN (Print)1-56396-900-9
Publication statusPublished - 1999
Event13th International Winterschool on Electronic Properties of Novel Materials - KIRCHBERG
Duration: 27 Feb 19996 Mar 1999

Conference

Conference13th International Winterschool on Electronic Properties of Novel Materials
CityKIRCHBERG
Period27/02/996/03/99

Keywords

  • ELECTRIC-FIELDS
  • NANOTUBES
  • CLUSTERS
  • CHAINS
  • WIRE

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