On the nature of the universal properties of amorphous solids

It is shown that many center excitations are responsible for the universal low energy spectral properties in an arbitrary ensemble of defect centers with an internal degree of freedom. Universality means a quasiuniform distribution of the energy and the logarithm of the tunneling amplitude together...

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Bibliographic Details
Published in:Physics letters. A 1996-06, Vol.215 (3), p.191-196
Main Authors: Burin, A.L, Kagan, Yu
Format: Article
Language:English
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Summary:It is shown that many center excitations are responsible for the universal low energy spectral properties in an arbitrary ensemble of defect centers with an internal degree of freedom. Universality means a quasiuniform distribution of the energy and the logarithm of the tunneling amplitude together with a disappearance of the dependence on the primary defect parameters.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(96)00191-0