Inversion symmetric two-level systems and the low-temperature universality in disordered solids
M. Schechter, P. C. E. Stamp
2013
Physical Review B
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 3K below which universality is observed. Our
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... odel describes disordered lattices; we also discuss its application to amorphous solids.
doi:10.1103/physrevb.88.174202
fatcat:mbhwoccpwrebtos57tszv2pdce