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Low-temperature specific heat of nanotube systems
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| Abstract |
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| The low-temperature specific heat of single-walled carbon nanotubes (isolated and bundled) and multiwalled carbon nanotubes is calculated within force-constant dynamical models. It is shown that, due to the quadratic dependence of the frequency omega of the transverse-acoustic phonons on the wave number q, the phonon density of states has a singularity of the type 1/rootomega and the very low-temperature specific heat varies as rootT with the temperature T. With the increase of the diameter of the system, the contributions of the longitudinal- and torsional-acoustic phonons to the specific heat begin to prevail and the latter becomes linear in T. These results are confirmed by the recent experimental data. | | |
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English
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| Source (journal) |
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Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015 | |
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Lancaster, Pa : 2002
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| ISSN |
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1098-0121 [print]
1550-235X [online]
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| Volume/pages |
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66:15(2002), p. 1-4
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| Article Reference |
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153408
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| ISI |
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000179080800037
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E-only publicatie
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| Full text (Publisher's DOI) |
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| Full text (open access) |
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