Publication Date:
2005-10-22
Description:
We present a low-temperature scanning tunneling microscopy (STM) study of K(x)C60 monolayers on Au(111) for 3 〈 or = x 〈 or = 4. The STM spectrum evolves from one that is characteristic of a metal at x = 3 to one that is characteristic of an insulator at x = 4. This electronic transition is accompanied by a dramatic structural rearrangement of the C60 molecules. The Jahn-Teller effect, a charge-induced mechanical deformation of molecular structure, is directly visualized in the K4C60 monolayer at the single-molecule level. These results, along with theoretical analyses, provide strong evidence that the transition from metal to insulator in K(x)C60 monolayers is caused by the Jahn-Teller effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wachowiak, A -- Yamachika, R -- Khoo, K H -- Wang, Y -- Grobis, M -- Lee, D-H -- Louie, Steven G -- Crommie, M F -- New York, N.Y. -- Science. 2005 Oct 21;310(5747):468-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, University of California at Berkeley, Berkeley, CA 94720-7300, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16239471" 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
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Natural Sciences in General
,
Physics
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