The role of quantum interference in determining transport properties of molecular bridges |
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Authors: | Kamil Walczak |
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Institution: | (1) Insitute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland |
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Abstract: | An analytical approach to the electron transport phenomena in molecular devices is presented. The analyzed devices are composed
of various molecular bridges attached to two semi-infinite electrodes. Molecular system is described within the tight-binding
model, while the coupling to the electrodes is analyzed through the use of Newns-Anderson chemisorption theory. The current-voltage
(I-V) characteristics are calculated through the integration of transmission function in the standard Landauer formulation.
The essential question of quantum interference effect of electron waves is diseussed in three aspects: (i) the geometry of
a molecular bridge, (ii) the presence of an external magnetic field and (iii) the location of chemical substituent. |
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Keywords: | molecular electronics electronic transport quantum interference molecular devices antiresonance |
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