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Fano Resonance and Orbital Filtering in Multiply Connected Carbon Nanotubes | Gunn Kim
; Sang Bong Lee
; Tae-Suk Kim
; Jisoon Ihm
; | Date: |
26 Feb 2004 | Journal: | Phys. Rev. B 71, 205415 (2005) | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | Affiliation: | School of Physics, Seoul National University, Seoul, Korea | Abstract: | We investigate the electron transport in multiply connected metallic carbon nanotubes within the Landauer-Büttiker formalism. Quasibound states coupled to the incident $pi^{*}$ states give rise to energy levels of different widths depending on the coupling strength. In particular, donorlike states originating from heptagonal rings are found to give a very narrow level. Interference between broad and narrow levels produces Fano-type resonant backscattering as well as resonant tunneling. Over a significantly wide energy range, almost perfect suppression of the conduction of $pi^{*}$ electrons occurs, which may be regarded as filtering of particular electrons ($pi$-pass filter). | Source: | arXiv, cond-mat/0402639 | Services: | Forum | Review | PDF | Favorites |
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