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Aharonov–Bohm interference in single‐walled carbon nanotube electron resonators
Author(s) -
Zhang Yong,
Han Mei,
Zheng Hongbo
Publication year - 2009
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.200945125
Subject(s) - zigzag , conductance , carbon nanotube , resonator , oscillation (cell signaling) , curvature , electron , condensed matter physics , aharonov–bohm effect , materials science , interference (communication) , magnetic field , nanotechnology , physics , optoelectronics , channel (broadcasting) , chemistry , quantum mechanics , electrical engineering , biochemistry , geometry , mathematics , engineering
Abstract Using the π orbital tight‐binding model and the multi‐channel Laudauer–Büttiker formula, both the effects of the Aharonov–Bohm effect and the curvature on quantum conductance oscillations of the electron resonators composed of armchair and primary zigzag single‐walled carbon nanotubes (SWNTs) in an axial magnetic field have been studied. It is found that the rapid and slow conductance oscillation periods of the armchair SWNTs depend on both the magnetic field and gate voltage in addition to the sample length. More interestingly, for the case of the primary zigzag SWNTs, one or two conductance oscillations in two different ranges of gate voltages was found for the first time, which would not exist without the curvature effect and should be observed in future experiments.