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Lattice Dynamics of Potassium-Doped Single-Walled Carbon Nanotubes
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XIAO Yang1;YAN Xiao-Hong1,2;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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Cite this article: |
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 E2g 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.
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Keywords:
61.46.+w
63.22.+m
68.43.Pq
65.80.+n
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Published: 01 March 2004
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