Synthesis of SWCNT rings made by two Y junctions and possible applications in electron interferometry

Daniel Grimm, Pedro Venezuela, Florian Banhart, Nicole Grobert, Humberto Terrones, Pulickel M. Ajayan, Mauricio Terrones Maldonado, Andrea Latgé

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

A ringlike single walled carbon nanotube (SWCNT) system made by two Y junctions naturally connected to nanotube systems generated inside the microscope under intense irradiation at 800°C was synthesized and its applications in optical interferometry were presented. The formation of standing waves in the arms of ringlike nanostructures show that the π-band tight-binding Hamiltonian depends on a sum over all lattice sites in terms of the electron creation and annihilation. The electronic wave-function reflections in the right and left stem of SWCNT takes place at both Y-birfucations, leading to oscillatory local density of states (LDOS) patterns around the van Hove singularity energies of the isolated tubes. The effective Y-junction ring (YJR)-brace barrier diminishes due to tunneling processes through defects, leading to finite conductance values inside the semiconducting gap.

Original languageEnglish (US)
Pages (from-to)1900-1905
Number of pages6
JournalSmall
Volume3
Issue number11
DOIs
StatePublished - Nov 1 2007

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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