RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Neutron Scattering Study on Dynamics of Atomic and Molecular Motions
III-5 Low-Energy Dynamics in Disordered Materials
Yasuhiro InamuraMitsutaka NakamuraMasatoshi Arai
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JOURNALS OPEN ACCESS

2016 Volume 65 Issue 7 Pages 319-324

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Abstract

Heat transport phenomena as the thermal conductivity or heat capacity in structurally disordered materials are different from those in crystal materials in low temperature region. These universal thermophysical properties in an atomic scale are directly related to the low-energy excitations, called Boson Peak, observed by neutron inelastic scattering and Raman scattering measurements. In addition, some results of the vibrational density of states obtained by neutron inelastic scattering measurement suggest the validity of two-level-system model which is widely accepted theoretical model of these universal thermophysical properties.

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© 2016 Japan Radioisotope Association
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