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Effects of Coulomb interaction in intentionally disordered semiconductor superlattices

✍ Scribed by G. Richter; W. Stolz; P. Thomas; S.W. Koch; K. Maschke; I.P. Zvyagin

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
87 KB
Volume
22
Category
Article
ISSN
0749-6036

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✦ Synopsis

The interplay between disorder and electron-electron interaction is studied using measurements of the vertical dc conductivity of intentionally disordered GaAs/Al 0.3 Ga 0.7 As superlattices. At low temperatures a quasimetallic behavior is observed even for large disorder which is attributed to an inhomogeneous charge distribution reducing the disorder potential. At low doping levels and low temperatures, exchange-correlation interaction leads to an inhomogeneous charge distribution over the wells of ordered superlattices similar to a one-dimensional Wigner lattice.

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a), I. Varga 2 (a), T. Lemm (a), J.E. Golub (a), K. Maschke (b), T. Meier (a), and S.W. Koch (a) (a) Fachbereich Physik und wissenschaftliches Zentrum fu È r Materialwissenschaften,