Abstract The Quantum Hall Effect (QHE) is one of the most remarkable condensed-matter
phenomena discovered in the second half of the 20 th century. It rivals superconductivity in …

Graphene exhibits quantum Hall ferromagnetism in which an approximate SU (4) symmetry
involving spin and valley degrees of freedom is spontaneously broken. We construct a set of …

Partially filled Landau levels host competing electronic orders. For example, electron solids
may prevail close to integer filling of the Landau levels before giving way to fractional …

The spin diffusion concept provides a classical description of a purely quantum-mechanical
evolution in inhomogeneously polarized many-body systems such as nuclear spin lattices …

Broken-symmetry ground states with uniform electron density are common in quantum Hall
systems when two Landau levels simultaneously approach the chemical potential at integer …

A system of two-dimensional electron gas in a strong magnetic field exhibits a remarkable
phenomenon known as the fractional quantum Hall effect. Rapid advances in experimental …

Resistively detected nuclear magnetic resonance measurements have been performed on a
high mobility heterostructure in the quantum Hall regime. At millikelvin temperatures the …

In this article we briefly review recent experimental and theoretical work on quantum Hall
effect in graphene, and argue that some of the quantum Hall states exhibit spontaneous …

Excitons, pairs of electrons and holes, undergo a Bose-Einstein condensation at low
temperatures. An important platform to study excitons is double-layer two-dimensional …

A resistively detected NMR technique was used to probe the two-dimensional electron gas
in a GaAs/AlGaAs quantum well. The spin-lattice relaxation rate (1/T 1) was extracted at near …