Anderson Mobility Gap Probed by Dynamic Coherent Backscattering

Laura A. Cobus (1) , Sergey E. Skipetrov (2) , Alexandre Aubry (3) , B. van Tiggelen (2) , Arnaud Derode (3) , John H. Page (1)

1 Department of physics and astronomy [Winnipeg]
2 LPM2C - Laboratoire de physique et modélisation des milieux condensés
3 IL - Institut Langevin - Ondes et Images (UMR7587)

We use dynamic coherent backscattering to study one of the Anderson mobility gaps in the vibrational spectrum of strongly disordered three-dimensional mesoglasses. Comparison of experimental results with the self-consistent theory of localization allows us to estimate the localization (correlation) length as a function of frequency in a wide spectral range covering bands of diffuse transport and a mobility gap delimited by two mobility edges. The results are corroborated by transmission measurements on one of our samples.

Domaines: Physique [physics]

Laura A. Cobus, Sergey E. Skipetrov, Alexandre Aubry, B. van Tiggelen, Arnaud Derode, et al.. Anderson Mobility Gap Probed by Dynamic Coherent Backscattering. Physical Review Letters, 2016, 116, pp.193901. ⟨10.1103/PhysRevLett.116.193901⟩. ⟨hal-01345455⟩