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

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

2010-11-25

arxiv.org/abs/1011.5558v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

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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