Diffusion and multifractality at the metal-insulator transition
We review the time evolution of wave packets at the metal-insulator transition in two- and three-dimensional disordered systems. The importance of scale invariance and multifractal eigenfunction fluctuations is stressed. The implications of the frequency and wave-vector dependences of the diffusion coefficient are compared with the results of numerical simulations. We argue that network models are particularly suited to the investigation of the dynamics of disordered systems.
Document Type: Research Article
Publication date: 01 May 1998
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