Phonons in Confinement and the Boson Peak Using Nuclear Inelastic Absorption
作者： T. Asthalter , M. Bauer , U. Van Bürck , I. Sergueev , H. Franz
DOI: 10.1007/978-94-010-0045-1_7
关键词: Heat capacity 、 Atomic physics 、 Boson peak 、 Inelastic scattering 、 Phonon 、 Nanoporous 、 Absorption (electromagnetic radiation) 、 Physics 、 Ferrocene 、 Nanocrystal
摘要: We have applied nuclear inelastic absorption (NIA) to the molecular glass former dibutylphthalate/ferrocene, both in bulk and nanoporous matrices having pore sizes of 50 25 A, respectively. The quantity g(E)/E 2, where g(E) is vibrational phonon density states (VDOS) resonant nuclei, exhibits a pronounced maximum at low energies. Confinement pores leads suppression VDOS below 1.5 meV, independent size. Also scaled heat capacity C(T)/T 3, we observe decrease peak for temperatures. Our observations are discussed light experimental theoretical results on nanocrystals recent model boson peak.
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