title: Resonant rayleigh scattering from bilayer quantum Hall phases.
abstract: We observe resonant Rayleigh scattering of light from quantum Hall bilayers at Landau level filling factor nu = 1. The effect arises below 1 Kelvin when electrons are in the incompressible quantum Hall phase with strong interlayer correlations. Marked changes in the Rayleigh scattering signal in response to application of an in-plane magnetic field indicate that the unexpected temperature dependence is linked to formation of a nonuniform electron fluid close to the phase transition towards the compressible state. These results demonstrate a new realm of study in which resonant Rayleigh scattering methods probe quantum phases of electrons in semiconductor heterostructures.
authors.affiliation: NEST CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Luin
authors.forename: Vittorio
authors.initials: V
authors.lastname: Pellegrini
authors.forename: Aron
authors.initials: A
authors.lastname: Pinczuk
authors.forename: Brian S
authors.initials: BS
authors.lastname: Dennis
authors.forename: Loren N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: Ken W
authors.initials: KW
authors.lastname: West