Visulaization of the Molecular Jahn-Teller Effect in an Insulating K4C60 Monolayer.
Saved in:
| Title: | Visulaization of the Molecular Jahn-Teller Effect in an Insulating K |
|---|---|
| Authors: | Wachowiak, A., Yamachika, R., Khoo, K. H., Wang, Y., Grobis, M., Lee, D.-H., Louie, Steven G., Crommie, M. F. |
| Source: | Science (pre-March 2025). 10/21/2005, Vol. 310 Issue 5747, p468-470. 3p. 1 Color Photograph, 3 Graphs. |
| Subjects: | Monomolecular films, Spectrum analysis, Quantum tunneling, Electric conductivity, Nanostructured materials, Nanoscience |
| Abstract: | We present a low-temperature scanning tunneling microscopy (STM) study of K[sub x]C[sub 60] monolayers on Au(111) for 3 ≤ x ≤ 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 C[sub 60] molecules. The Jahn-Teller effect, a charge-induced mechanical deformation of molecular structure, is directly visualized in the K[sub 4]C[sub 60] monolayer at the single-molecule level. These results, along with theoretical analyses, provide strong evidence that the transition from metal to insulator in K[sub X]C[sub 60] monolayers is caused by the Jahn-Teller effect. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | We present a low-temperature scanning tunneling microscopy (STM) study of K[sub x]C[sub 60] monolayers on Au(111) for 3 ≤ x ≤ 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 C[sub 60] molecules. The Jahn-Teller effect, a charge-induced mechanical deformation of molecular structure, is directly visualized in the K[sub 4]C[sub 60] monolayer at the single-molecule level. These results, along with theoretical analyses, provide strong evidence that the transition from metal to insulator in K[sub X]C[sub 60] monolayers is caused by the Jahn-Teller effect. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 00368075 |
| DOI: | 10.1126/science.1117303 |
