The fermi level dependent electronic properties of the smallest (2,2) carbon nanotube

Li Chang Yin, Riichiro Saito, Mildred S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A metal-semiconductor transition in the smallest (2,2) single-wall carbon nanotube (SWNT) is predicted theoretically as a function of gate voltage. By hole-doping (or heavy electron-doping), the energy gap of a neutral (2,2) SWNT vanishes with structural change, and the (2,2) SWNT becomes metallic. The (2,2) tube assumes a doubly degenerate ground state around the charge neutral condition with an energy barrier, while this tube has only one nondegenerate metallic ground state over an energy window of -0.12 to +0.40 eV. Because of a high density of states at the Fermi energy for hole-doped (2,2) SWNTs, a possible superconducting transition is expected.

Original languageEnglish
Pages (from-to)3290-3296
Number of pages7
JournalNano Letters
Volume10
Issue number9
DOIs
Publication statusPublished - 2010 Sep 8

Keywords

  • (2,2) carbon nanotube
  • Fermi level
  • electrochemical doping
  • metal-semiconductor transition
  • superconductivity

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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