Coulomb drag is a transport phenomenon whereby long-range Coulomb interaction
between charge carriers in two closely spaced but electrically isolated conductors induces a …

The main purpose of this paper is to further our theoretical understanding of the fractional
quantum Hall effect, in particular of spin effects, in two-dimensional incompressible electron …

A spatially indirect exciton is created when an electron and a hole, confined to separate
layers of a double quantum well system, bind to form a composite boson,. Such excitons are …

At strong magnetic fields, double-layer two-dimensional electron-gas systems can form an
unusual broken-symmetry state with spontaneous interlayer phase coherence. In this paper …

Transport studies on bilayer two-dimensional electron systems in GaAs double quantum
wells have revealed a new fractional quantum Hall state that has no known counterpart in a …

We show that, in the absence of interlayer hopping, the ν= 1/m quantum Hall states in
double-layer systems contain a neutral gapless mode with linear dispersion, describing the …

The tunneling conductance between two parallel 2D electron systems has been measured
in a regime of strong interlayer Coulomb correlations. At total Landau level filling ν T= 1 the …

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 …

The condensation of excitons, bound electron-hole pairs in a solid, into a coherent collective
electronic state was predicted more than 50 years ago. Perhaps surprisingly, the …

The ν= 1 quantum Hall effect in bilayer 2D electron systems is shown to continuously evolve
from a regime dominated by single-particle tunneling into one where interlayer Coulomb …