Abstract
AbstractStanding electronic wave formation inside single walled carbon nanotube Y‐junction rings and quantum dots with a quantum‐dot‐like quadratic dispersion is reported. Remarkably, the detailed structural defect configurations play only a minor role and the standing wave oscillation dispersions are mainly triggered by the electronic properties of the pristine constituent tubes. This raises the possibility of using both structures as nanoscale tuneable electronic switching devices. Near the Fermi level, quantum dots show smooth dispersing oscillations reminiscent of the finite pristine tube eigenvalues. However, localized density of states peaks are found in YJRs, which are identified as interference effects of the double‐slit interferometer. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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