Magnetic-field-induced insulator-quantum Hall conductor-insulator transitions in doped GaAs/AlxGa1-xAs quantum wells
Journal
Physical Review B - Condensed Matter and Materials Physics
Journal Volume
56
Journal Issue
23
Pages
15238-15241
Date Issued
1997
Author(s)
Abstract
We present magnetotransport measurements on (Formula presented) multiple quantum wells doped with impurities at the centers of GaAs layers. Magnetic-field-induced insulator-quantum Hall conductor-insulator transitions with a well defined scaling behavior were observed. The critical exponents as well as the resistivities at the two critical magnetic fields are close to each other. Their values are, however, different from the values obtained from similar studies performed on modulation-doped (Formula presented) heterostructures. © 1997 The American Physical Society.
Type
journal article