Virginia TechBurke, Brian G.Chan, JackWilliams, Keith A.Fuhrer, TimothyFu, Wujun J.Dorn, Harry C.Puretzky, Alexander A.Geohegan, David B.2014-05-072014-05-072011-03Burke, B. G.; Chan, J.; Williams, K. A.; Fuhrer, T.; Fu, W. J.; Dorn, H. C.; Puretzky, A. A.; Geohegan, D. B., "Vibrational spectrum of the endohedral Y2C2@C-92 fullerene by Raman spectroscopy: Evidence for tunneling of the diatomic C-2 molecule," Phys. Rev. B 83, 115457 DOI: http://dx.doi.org/10.1103/PhysRevB.83.1154571098-0121http://hdl.handle.net/10919/47909The structure and vibrational spectrum of the novel endohedral fullerene Y2C2@C-92 was studied by Raman spectroscopy, with particular emphasis on the rotational transitions of the diatomic C-2 unit in the low-energy Raman spectrum. We report evidence for tunneling of this unit through the C-2 rotation plane and observe anomalous narrowing in a hindered rotational mode. We also report complementary density functional theory calculations that support our conclusions and discuss potential applications to quantum computing and nonvolatile memory devices.en-USIn Copyrightimaging contrast agentwater-soluble metallofullerenescagesinglefamilyphysics, condensed matterArticle - Refereedhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.115457https://doi.org/10.1103/PhysRevB.83.115457