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A pure-carbon ring transistor: The rle of topology and structure
J. Yi , G. Cuniberti, M. Porto
Topology in Condensed Matter Physics
2002.05.13-31(07); Dresden, Germany
| We report results on the rectification properties of a
carbon nanotube (CNT) ring transistor, contacted by CNT
leads, whose novel features have been recently
communicated by Watanabe et al. [Appl. Phys.
Lett. 78, 2928 (2001)]. This paper contains
results which are validated by the experimental
observations. Moreover, we report on additional
features of the transmission of this ring device which
are associated with the possibility of breaking the
lead inversion symmetry. The linear conductance
displays a ``chessboard''-like behavior alternated with
anomalous zero-lines which should be directly
observable in experiments. We are also able to
discriminate in our results structural properties
(quasi-onedimensional confinement) from pure
topological effects (ring configuration), thus helping
to gain physical intuition on the rich ring
phenomenology.
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Prof. Dr. Gianaurelio Cuniberti
secretariat:
postal address:
Institute for Materials Science
TU Dresden
01062 Dresden, Germany
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