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Abstract: Molecular electronic devices currently serve as a platform for studying avariety of physical phenomena only accessible at the nanometer scale. One suchphenomenon is the highly correlated electronic state responsible for the Kondoeffect, manifested here as a -Kondo resonance- in the conductance. Because theKondo effect results from strong electron-electron interactions, it is notcaptured by the usual quantum chemistry approaches traditionally applied tounderstand chemical electron transfer. In this review we will discuss theorigins and phenomenology of Kondo resonances observed in single moleculedevices, focusing primarily on the spin-1-2 Kondo state arising from a singleunpaired electron. We explore the rich physical system of a single-moleculedevice, which offers a unique spectroscopic tool for investigating theinterplay of emergent Kondo behavior and such properties as molecular orbitaltransitions and vibrational modes. We will additionally address more exoticsystems, such as higher spin states in the Kondo regime, and we will reviewrecent experimental advances in the ability to manipulate and exert controlover these nanoscale devices.



Author: Gavin D. Scott, Douglas Natelson

Source: https://arxiv.org/



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