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arXiv · 1409.3388

IETS and quantum interference: propensity rules in the presence of an interference feature

Jacob Lykkebo·Alessio Gagliardi·Alessandro Pecchia·Gemma C. Solomon
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Abstract

Destructive quantum interference in single molecule electronics is an intriguing phe- nomenon; however, distinguishing quantum interference effects from generically low transmission is not trivial. In this paper, we discuss how quantum interference ef- fects in the transmission lead to either low current or a particular line shape in current-voltage curves, depending on the position of the interference feature. Sec- ondly, we consider how inelastic electron tunneling spectroscopy can be used to probe the presence of an interference feature by identifying vibrational modes that are se- lectively suppressed when quantum interference effects dominate. That is, we expand the understanding of propensity rules in inelastic electron tunneling spectroscopy to molecules with destructive quantum interference.

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Jacob Lykkebo, Alessio Gagliardi, Alessandro Pecchia, Gemma C. Solomon. 2014-09-11. IETS and quantum interference: propensity rules in the presence of an interference feature. https://doi.org/10.1063/1.4896234

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