Low-temperature thermodynamics of Xe-doped fullerite C₆₀
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Low-temperature thermodynamics of Xe-doped fullerite C₆₀
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| Creator |
Klochko, M.S.
Strzhemechny, M.A. |
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| Subject |
10th International Conference on Cryocrystals and Quantum Crystals
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| Description |
Using a model of the fullerene C₆₀ molecule with carbon atoms uniformly distributed over its surface, the potential energy U(n) of a Xe atom in an octahedral void of C₆₀ is calculated. Within the framework of threedimensional harmonic oscillator, the lowest energy levels are estimated and the contribution of xenon impurity atoms to the heat capacity of the Xe–C₆₀ system is determined. The contribution of Xe dopants to the total heat capacity is shown to be essential compared to that of pure fullerite. Using the calculated energy spectrum we estimated the contribution of Xe atoms to the thermal expansivity of C₆₀ with 37% of Xe. This contribution is in a qualitative agreement with experimental findings. We estimated the Grüneisen parameter Г due to the anisotropic part of U(n) to show that the negative part of Г is negligible due to the very small width of the five lower oscillatory wave functions. |
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| Date |
2017-12-31T13:57:02Z
2017-12-31T13:57:02Z 2015 |
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| Type |
Article
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| Identifier |
Low-temperature thermodynamics of Xe-doped fullerite C₆₀ / M.S. Klochko, M.A. Strzhemechny // Физика низких температур. — 2015. — Т. 41, № 6. — С. 620-624. — Бібліогр.: 13 назв. — англ.
0132-6414 PACS: 61.48.+c, 61.72.Ji, 65.40.De, 65.40.Ba http://dspace.nbuv.gov.ua/handle/123456789/127939 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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