The phase diagram of an interacting two-dimensional electron system in a high magnetic
field is enriched by the varying form of the effective Coulomb interaction, which depends …

We report complex magnetotransport patterns of the ν= 1 integer quantum Hall state in a
GaAs/AlGaAs sample from the newest generation with a record high electron mobility. The …

When interactions overcome disorder, integer quantum Hall plateaus support topological
phases with different bulk insulators. In the center of the ν= 1 plateau the bulk is an …

A two-dimensional system with extra degrees of freedom, such as spin and valley, is of great
interest in the study of quantum phase transitions. The critical condition when a transition …

A low-disorder, two-dimensional electron system (2DES) subjected to a large perpendicular
magnetic field and cooled to very low temperatures provides a rich platform for studies of …

This thesis covers many-body liquids and solids occurring in two-dimensional electron
systems (2DESs) confined to GaAs and AlAs quantum wells subjected to a large …