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2004 | 2 | 3 | 524-533
Tytuł artykułu

The role of quantum interference in determining transport properties of molecular bridges

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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.

Opis fizyczny
  • Insitute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznań, Poland,
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