Abstract
We have performed path-integral Monte Carlo calculations to study the adsorption of N 4He atoms on a single C28 fullerene molecule. Radial density distributions show a layer-by-layer growth of 4He with the first adlayer being located at a distance of 5.3 Å from the center of C28. The monolayer is found to show a commensurate structure at N=16 with each of the 16 adsorption sites on the molecular surface being occupied by one 4He atom. As more helium atoms are adsorbed beyond N=16, the adlayer is in a mixed state consisting of 4 localized atoms at the hexagonal faces and the other atoms delocalized over the pentagonal faces. Another structurally-ordered state is observed at N=32, where the helium layer shows the same crystalline structure with an icosahedral symmetry as observed for 32 4He atoms on a C60 molecule. It is found that more 4He atoms can be squeezed into the first layer to disrupt this icosahedral structure when enough 4He atoms are added in the second layer. Finally we observe the reentrant superfluid response of the monolayer with superfluidity being quenched completely at the ordered states of N=16 and 32.
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Notes
Currently we do not have an information about the interaction potential between a 4He atom and a metal-encapsulated C28 fullerene.
References
G. Zimmerli, G. Mistura, M.W.H. Chan, Phys. Rev. Lett. 68, 60 (1992)
Y. Kwon, D.M. Ceperley, Phys. Rev. B 85, 224501 (2012)
M.W. Cole et al., Phys. Rev. Lett. 84, 3883 (2000)
J.C. Lasjaunias et al., Phys. Rev. Lett. 91, 025901 (2003)
J.V. Pearce et al., Phys. Rev. Lett. 95, 185302 (2005)
M.C. Gordillo, Phys. Rev. Lett. 101, 046102 (2008)
D.S. Greywall, P.A. Busch, Phys. Rev. Lett. 67, 3535 (1991)
P.A. Crowell, J.D. Reppy, Phys. Rev. Lett. 70, 3291 (1993)
P.A. Crowell, J.D. Reppy, Phys. Rev. B 53, 2701 (1996)
E.S. Hernandez et al., Phys. Rev. B 68, 125418 (2003)
Y. Kwon, H. Shin, Phys. Rev. B 82, 172506 (2010)
H. Shin, Y. Kwon, J. Chem. Phys. 136, 064514 (2012)
F. Calvo, Phys. Rev. B 85, 060502(R) (2012)
C. Leidlmair et al., Phys. Rev. Lett. 108, 076101 (2012)
P.W. Fowler et al., J. Chem. Soc., Perkins Trans. 2, 795 (1993)
T. Guo, R.E. Smalley, G.E. Scuseria, J. Chem. Phys. 99, 352 (1993)
Yu.N. Makurin et al., Chem. Phys. 270, 293 (2001)
P.W. Dunk et al., J. Am. Chem. Soc. 134, 9380 (2012)
G. Stan, M.W. Cole, Surf. Sci. 395, 280 (1998)
D.M. Ceperley, Rev. Mod. Phys. 67, 279 (1995)
R.A. Aziz et al., Mol. Phys. 77, 321 (1992)
Acknowledgements
This work was supported by Konkuk University, and by Basic Science Research Program (2012006887) and the WCU Program (R31-2008-000-10057-0) through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology.
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Kim, B., Kwon, Y. Structural and Superfluid Properties of the 4He Monolayer on a C28 Molecule. J Low Temp Phys 171, 599–605 (2013). https://doi.org/10.1007/s10909-012-0732-2
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DOI: https://doi.org/10.1007/s10909-012-0732-2