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Metallic Rb4C60 and Rb5C60 on the top layer of C60 single crystal

✍ Scribed by Hongnian Li; Ibrahim Kurash; Fengqin Liu; Yabo Xu

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
177 KB
Volume
540
Category
Article
ISSN
0039-6028

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✦ Synopsis

Photoemission studies reveal the existences of metallic Rb 4 C 60 and Rb 5 C 60 surface phases on the top layer of C 60 single crystal. After Rb 3 C 60 thin film with thickness of nanometers has formed on the (1 1 1) surface layers of the C 60 single crystal, the excess deposition of Rb atoms do not induce the bulk-like face-centered cubic to body-centered tetragonal or body-centered cubic structure transitions at room temperature. The large size of C 60 molecule offers the surface vacancies for the formation of Rb 4 C 60 and Rb 5 C 60 monolayer that is further verified by Rb 3d core-level photoemission measurements. Valence band photoemission results exhibit the surface phases are metallic.

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