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arXiv 0910.1283cond-mat.dis-nncond-mat.mtrl-sci
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无序固体中的低温普适性

Low temperature universality in disordered solids

M. Schechter, P. C. E. Stamp

摘要:

考虑了无序和非晶态固体的低温普适性质。我们介绍了一个模型,其中包括两种类型的两个级别的系统(TLS),其中,基于他们的本地对称性,弱或强相互作用的声子场。这很好地解释了实验结果,并解决了一些长期存在的问题:TLS的性质;声子衰减的微小性和普遍性,以及$3$ K的能量标度,在该标度以下观察到普遍性。我们的模型描述了无序晶格,我们也讨论了它的应用非晶态固体。

英文摘要:

The low temperature universal properties in disordered and amorphous solids are considered. We introduce a model that includes two types of two level systems (TLSs), which, based on their local symmetry, interact weakly or strongly with the phonon field. This accounts well for the experimental results, and addresses some long-standing questions: the nature of the TLSs; the smallness and universality of the phonon attenuation, and the energy scale of $3$K below which universality is observed. Our model describes disordered lattices; we also discuss its application to amorphous solids.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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