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Specific Heat of Rhombohedral Polymeric C60 in Temperature Range 300--2K |
CUI Guang-Lei1;GU Min1;YU Yao1;XU Xi-Bin1;WANG Li-Hang1;CHEN
Xiao1;FENG Duan1;TANG Tong Bor2 |
| 1National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 2100932Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong |
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| Cite this article: |
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CUI Guang-Lei, GU Min, YU Yao et al 2008 Chin. Phys. Lett. 25 658-660 |
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Abstract Polymerization of C60 is realized under high temperature and high pressure. X-ray diffraction reveals a rhombohedral lattice structure in the product, and
solid-state 13C nuclear magnetic resonance spectroscopy confirms the formation of sp3 bonds between C60 molecules. Specific heat is then measured over the temperature range of 300--2K. It is found that its specific heat values are significantly less than those in fullerite within the region of
80--2K, and this huge reduction is attributed to the suppression of intermolecular librational modes in polymerized C60. An excellent fit to the experimental data over the entire temperature range is provided by a model, which needs to include only three-dimensional and two-dimensional translational modes in various contributions at different temperatures.
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| Keywords:
65.40.Ba
61.48.+c
81.40.-z
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Received: 13 August 2007
Published: 30 January 2008
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| PACS: |
65.40.Ba
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(Heat capacity)
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61.48.+c
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81.40.-z
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(Treatment of materials and its effects on microstructure, nanostructure, And properties)
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