RT Journal Article T1 Electronic structure and vertical transport in random dimer GaAs-Al_xGa_(1-x)As superlattices A1 Parisini, A. A1 Tarricone, L. A1 Bellani, V. A1 Parravicini, G. B. A1 Díaz García, Elena A1 Domínguez-Adame Acosta, Francisco A1 Hey, R. AB We report a systematic study of several GaAs-AlxGa1-xAs semiconductor superlattices grown by molecular-beam epitaxy specifically designed to explore the existence of extended states in random dimer superlattices. We have confirmed our previous results [V. Bellani et al., Phys. Rev. Lett. 82, 2159 (1999)] with much additional evidence that allows us to lay claim to a clear-cut experimental verification of the presence of extended states in random dimer superlattices due to the short-range correlations (dimers) that inhibit the localization effects of the disorder. PB American Physical Society SN 1098-0121 YR 2001 FD 2001-01-15 LK https://hdl.handle.net/20.500.14352/59352 UL https://hdl.handle.net/20.500.14352/59352 LA eng NO © 2001 The American Physical Society.We are grateful to J. C. Flores, K. Fujiwara, G. Guizzetti, M. Hilke, C. Kanyinda-Malu, A. Stella, and D. Tsui for their enlightening discussions. Work in Italy has been supported by the INFM Network ‘‘Fisica e Tecnologia dei Semiconduttori III-V’’ and in Madrid by DGES under Project MAT2000-0734. NO DGES NO INFM Network ‘‘Fisica e Tecnologia dei Semiconduttori III-V’’ DS Docta Complutense RD 14 dic 2025