Effects of Off-Diagonal Electron-Electron Interactions on Exciton Energies in C<suB>60</suB>

Chin. Phys. Lett.

1996, Vol. 13

Issue (11): 863-866 DOI:

Original Articles

Effects of Off-Diagonal Electron-Electron Interactions on Exciton Energies in C₆₀

RAO Xue-song;ZHAO Hua;FU Rou-li;SUN Xin;K. NASU¹

T. D. Lee Laboratory and Department of Physics, Fudan University, Shanghai 200433 and National Laboratory of Infrared Physics, Chinese Academy of Sciences, Shanghai, 200083 ¹National Laboratory for High Energy Physics, Tsukuba, Ibaraki 305, Japan

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RAO Xue-song, ZHAO Hua, FU Rou-li et al 1996 Chin. Phys. Lett. 13 863-866

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Abstract Since the neighboring π orbits in C₆₀ are well overlapped, the off-diagonal part of electron interaction plays an important role. In this paper, the effects of the off-diagonal electron interactions on the exciton energies in C₆₀ are studied by using the single configuration interaction approach. It is found that the binding energies of the low-lying singlet and triplet excitons depend sensitively upon the off-diagonal interactions which compete against the diagonal interactions and suppress the binding of the excitons. The implication of these features is discussed.

Keywords: 71.35.+z 61.46.+w

Published: 01 November 1996

PACS:	71.35.+z
	61.46.+w

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1996/V13/I11/0863

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	ZHAO Hua
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	K. NASU

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