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243. 


Control of quantum interference in molecular junctions: Understanding the origin of Fano and anti-resonances



D. Nozaki, H. Sevincli, S. M. Avdoshenko, R. Gutierrez, and G. Cuniberti



We investigate within a coarse-grained model the conditions leading to the appearance of Fano resonances or anti-resonances in the conductance spectrum of a generic molecular junction with a side group (T-junction). By introducing a simple graphical representation (parabolic diagram), we can easily visualize the relation between the different electronic parameters determining the regimes where Fano resonances or anti-resonances in the low-energy conductance spectrum can be expected. The results obtained within the coarse-grained model are validated using density-functional based quantum transport calculations in realistic T-shaped molecular junctions.



online .pdf paper (for personal use only)online .pdf paper (for personal use only)
online abstractarXiv preprint: 1203.5269
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