Carbon nanotube sensor for vibrating molecules

The transport properties of a CNT capacitively coupled to a molecule vibrating along one of its librational modes are studied and its transport properties analyzed in the presence of an STM tip. We evaluate the linear charge and thermal conductances of the system and its thermopower. They are domina...

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Bibliographic Details
Published in:arXiv.org 2013-09
Main Authors: Remaggi, F, N Traverso Ziani, Dolcetto, G, Cavaliere, F, Sassetti, M
Format: Article
Language:English
Subjects:
Carbon nanotubes
Coupling (molecular)
Resistance
Thermoelectricity
Transport properties
Online Access:Get full text
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Summary:The transport properties of a CNT capacitively coupled to a molecule vibrating along one of its librational modes are studied and its transport properties analyzed in the presence of an STM tip. We evaluate the linear charge and thermal conductances of the system and its thermopower. They are dominated by position-dependent Franck-Condon factors, governed by a position-dependent effective coupling constant peaked at the molecule position. Both conductance and thermopower allow to extract some information on the position of the molecule along the CNT. Crucially, however, thermopower sheds also light on the vibrational levelspacing, allowing to obtain a more complete characterization of the molecule even in the linear regime.
ISSN:2331-8422
DOI:10.48550/arxiv.1309.2764