Low-temperature specific heat of C60.
作者： W. P. Beyermann , M. F. Hundley , J. D. Thompson , F. N. Diederich , G. Grüner
DOI: 10.1103/PHYSREVLETT.68.2046
关键词:
摘要: We have measured a large specific heat of polycrystalline ${\mathrm{C}}_{60}$ from T=1.4 to 20 K. The data were adequately fitted by model containing Debye terms, Einstein oscillators, and linear contribution. An analysis incorporating both vibrational strongly coupled rotational degrees freedom expected for the simple-cubic structure at low temperatures is proposed. also discuss possible interpretation based on fairly narrow feature in excitation spectrum. term may be consequence disorder resulting distribution two-level tunneling centers.
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