Delocalization in continuous disordered systems
- Universite de Geneve, Departement de Physique Theorique, 24 Quai Ernest-Ansermet, CH-1211 Geneve 4 (Switzerland)
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 localization length is studied and a critical exponent (2)/(3) is found for the {delta}-barrier case, whereas for the quantum 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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 560726
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 16 Vol. 55; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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