Lattice Dynamics of Potassium-Doped Single-Walled Carbon Nanotubes

Chin. Phys. Lett.

2004, Vol. 21

Issue (3): 517-520 DOI:

Original Articles

Lattice Dynamics of Potassium-Doped Single-Walled Carbon Nanotubes

XIAO Yang¹;YAN Xiao-Hong^1,2;CAO Jue-Xian¹;MAO Yu-Liang¹;DENG Yu-Xiang¹;DING Jian-Wen¹

¹Department of Physics and Institute of Modern Physics, Xiangtan University, Xiangtan 411105 ²Interdisciplinary Center of Theoretical Studies and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080

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XIAO Yang, YAN Xiao-Hong, CAO Jue-Xian et al 2004 Chin. Phys. Lett. 21 517-520

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Abstract We calculate the vibrational properties of potassium-doped single-walled carbon nanotubes within lattice dynamical theory. The results show that the frequency of high-frequency Raman mode E_2g for K₅C₄₀ downshifts to 1553 cm^-1, which is in agreement with the value for highly doped samples with effective composition KC₈. Moreover, the specific heat curves have a turnover at 22 K, originating from the saturation of K atoms vibrational modes at low energy.

Keywords: 61.46.+w 63.22.+m 68.43.Pq 65.80.+n

Published: 01 March 2004

PACS:	61.46.+w
	63.22.+m
	68.43.Pq	(Adsorbate vibrations)
	65.80.+n

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2004/V21/I3/0517

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	DING Jian-Wen

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