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Standing‐wave observations in single‐wall carbon nanotube quantum dots and Y‐junction rings
Author(s) -
Grimm Daniel,
Latgé Andrea,
Venezuela Pedro
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200776161
Subject(s) - quantum dot , carbon nanotube , standing wave , condensed matter physics , nanoscopic scale , oscillation (cell signaling) , electronic structure , materials science , carbon nanotube quantum dot , quantum , fermi level , physics , nanotube , nanotechnology , quantum mechanics , chemistry , electron , biochemistry
Standing 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)