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Delocalization in continuous disordered systems
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DOI：10.1103/PhysRevB.55.10625.png)
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Abstract
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Continuous one-dimensional models supporting extended states are studied. These delocalized states occur at well-defined values of the energy and are consequences of simple statistical correlation rules. We explicitly study alloys of delta-barrier potentials as well as alloys and liquids of quantum wells. The divergence of the 2/3 is found for the delta-barrier case, whereas for the quantum localization length is studied and a critical exponent, wells we find an exponent of 2 or 2/3 depending on the well's parameters. These results support the idea that correlations between random scattering sequences break Anderson localization. We further calculate the conductance of disordered superlattices. At the peak transmission the relative fluctuations of the transmission coefficient are vanishing.
Keywords:
RANDOM-DIMER MODEL
CORRELATED DISORDER
BINARY-ALLOYS
RANDOM CHAINS
LOCALIZATION
ABSENCE
TRANSPORT
LATTICES
EXPONENT
STATES
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