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arXiv · 1011.5558

Kondo effect of a Co atom on Cu(111) in contact with an Fe tip

N. Neel·J. Kroeger·R. Berndt
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Abstract

Single Co atoms, which exhibit a Kondo effect on Cu(111), are contacted with Cu and Fe tips in a low-temperature scanning tunneling microscope. With Fe tips, the Kondo effect persists with the Abrikosov-Suhl resonance significantly broadened. In contrast, for Cu-covered W tips, the resonance width remains almost constant throughout the tunneling and contact ranges. The distinct changes of the line width are interpreted in terms of modifications of the Co d state occupation owing to hybridization with the tip apex atoms.

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N. Neel, J. Kroeger, R. Berndt. 2010-11-25. Kondo effect of a Co atom on Cu(111) in contact with an Fe tip. https://doi.org/10.1103/physrevb.82.233401

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