Field emission patterns from first-principles electronic structures: Application to pristine and cesium-doped carbon nanotubes

Mohammad Khazaei, Amir A. Farajian, Yoshiyuki Kawazoe

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A general approach is introduced to calculate field emission properties of any kind of nanostructure based on the first-principles local density of states (LDOS) and effective potentials. The experimental field emission spectroscopy images are explained as LDOS at the structure-vacuum barrier, weighted by the probability of electron tunneling. The method excellently reproduces the experimental field emission patterns of pristine capped carbon nanotubes. We show that cesium adsorbates even with a low doping ratio of one dopant per nanotube increase the emission current around 2.5 times, due to a generated dipole field.

Original languageEnglish
Article number177602
JournalPhysical Review Letters
Volume95
Issue number17
DOIs
Publication statusPublished - 2005 Oct 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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