title: Dynamic charge fluctuation of endohedral fullerene with coencapsulated Be atom and H2.
abstract: As one of the typical examples of characteristic reaction field generated in inclusion (enclosure) compounds, the dynamics of an endohedral metallofullerene, (Be+nH2)@C60(n=1,2), is studied with Be atom serving as a test probe. A very large dynamical and thermal fluctuation of electronic state of Be has been found, which is surprising since the highest occupied molecular orbital-lowest unoccupied molecular orbital gap of Be is so wide that such a large fluctuation in a low temperature is never expected. This finding demonstrates one of the special features of endohedral reaction field offered by the fullerene. The physical origin of this phenomenon is analyzed.
authors.affiliation: Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Komaba, 153-8902, Tokyo, Japan. shigeta@qcl.t.u-tokyo.ac.jp
authors.forename: Yasuteru
authors.initials: Y
authors.lastname: Shigeta
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takatsuka