Localization and Relaxation in Anisotropically Disordered Systems |
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| Authors: | Yu SHI Chang-De GONG |
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| Affiliation: | 1. Fudan-T. D. Lee Physics Laboratory and Department of Physics Fudan University, shanghai 200433, China;2. Department of Physics, Nanjing University, Nanjing 210008, China |
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| Abstract: | We discuss localization and the scattering of excitations in bifractals, a model of anisotropically disordered systems. The localization behavior is anisotropic. With the increase of energy, the excitation crosses over from an extended wave to a wave extended in one subspace while localized in another, then to a wholly-localized wave. The loffe-Regel frequency is shown to be in the wholly-localized regime. Relaxation processes are calculated for the emission and absorption of localized vibrational excitations by a localized electronic state.The anisotropy makes effects on the results. |
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