Publication Date:
2005-09-06
Description:
We report that the Kondo effect exerted by a magnetic ion depends on its chemical environment. A cobalt phthalocyanine molecule adsorbed on an Au111 surface exhibited no Kondo effect. Cutting away eight hydrogen atoms from the molecule with voltage pulses from a scanning tunneling microscope tip allowed the four orbitals of this molecule to chemically bond to the gold substrate. The localized spin was recovered in this artificial molecular structure, and a clear Kondo resonance was observed near the Fermi surface. We attribute the high Kondo temperature (more than 200 kelvin) to the small on-site Coulomb repulsion and the large half-width of the hybridized d-level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhao, Aidi -- Li, Qunxiang -- Chen, Lan -- Xiang, Hongjun -- Wang, Weihua -- Pan, Shuan -- Wang, Bing -- Xiao, Xudong -- Yang, Jinlong -- Hou, J G -- Zhu, Qingshi -- New York, N.Y. -- Science. 2005 Sep 2;309(5740):1542-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China (USTC), Hefei, Anhui 230026, People's Republic of China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16141069" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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