Kondo versus magnetic coupling of cobalt dimers in a Cu--O (2 X 1) reconstruction IOPselect

Co atoms and dimers embedded in a Cu(110)(2 X 1)--O surface oxide are investigated via low-temperature STM/STS experiments and first-principles simulations. It is found that Co dimers incorporated into adjacent rows of the Cu(110)(2 X 1)--O reconstruction show Kondo resonances decoupled from each ot...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2010-06, Vol.22 (22), p.222202-222202
Main Authors: Gumbsch, Andreas, Barcaro, Giovanni, Ramsey, Mike G, Surnev, Svetlozar, tunelli, Alessandro, Netzer, Falko P
Format: Article
Language:English
Subjects:
COMPUTER SIMULATION
Condensed matter
Dimers
Kondo effect
MAGNETIC PROPERTIES
OXIDES
Reconstruction
Scanning tunneling microscopy
Simulation
Surface chemistry
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Summary:Co atoms and dimers embedded in a Cu(110)(2 X 1)--O surface oxide are investigated via low-temperature STM/STS experiments and first-principles simulations. It is found that Co dimers incorporated into adjacent rows of the Cu(110)(2 X 1)--O reconstruction show Kondo resonances decoupled from each other, whereas they are antiferromagnetically coupled (and do not exhibit a Kondo effect) when they are aligned on the same row. This shows that it is possible to decouple single carriers of the Kondo effect via a proper choice of the adsorption and host geometry. It is also shown that an oxidic environment presents features remarkably different from those of pure metal substrates.
ISSN:0953-8984
DOI:10.1088/0953-8984/22/22/222202