Among very-low-disorder systems of condensed matter, the high-mobility two-dimensional
electron gas (2DEG) confined in aluminum gallium arsenide (AlGaAs)–gallium arsenide …

This review visits recent experimental efforts on high mobility two-dimensional electron
systems (2DES) hosted at the Mg x Zn $ _ {{\rm 1}-x} $ O/ZnO heterointerface. We begin with …

Electrons in topological flat bands can form novel topological states driven by the correlation
effects. The penta-layer rhombohedral graphene/hBN moire superlattice has been shown to …

The phenomenon of fractional quantum Hall effect (FQHE) was first experimentally observed
33 years ago. FQHE involves strong Coulomb interactions and correlations among the …

Bilayers consisting of two-dimensional (2D) electron and hole gases separated by a 10 nm
thick AlGaAs barrier are formed by charge accumulation in epitaxially grown GaAs. Both …

Strong interactions and topology drive a wide variety of correlated ground states. Some of
the most interesting of these ground states, such as fractional quantum Hall states and …

We measure weak quasiparticle tunneling across a constriction in the second Landau level.
At ν= 7/3, 8/3, and 5/2, comparison of temperature and dc bias dependence to weak …

We study the competition between the electron liquid and solid phases, such as Wigner
crystal and bubbles, in partially filled Landau levels (LLs) of multilayer graphene. Graphene …

We report experimental observation of the reentrant integer quantum Hall effect in graphene,
appearing in the N= 2 Landau level. Similar to high-mobility GaAs/AlGaAs heterostructures …

The ν= 12/5 fractional quantum Hall plateau observed in GaAs semiconductor wells is a
suspect in the search for non-Abelian Fibonacci anyons. Using the infinite density matrix …