title: Optical Emission Spectroscopy Study of Competing Phases of Electrons in the Second Landau Level.
abstract: Quantum phases of electrons in the filling factor range 2≤ν≤3 are probed by the weak optical emission from the partially populated second Landau level and spin wave measurements. Observations of optical emission include a multiplet of sharp peaks that exhibit a strong filling factor dependence. Spin wave measurements by resonant inelastic light scattering probe breaking of spin rotational invariance and are used to link this optical emission with collective phases of electrons. A remarkably rapid interplay between emission peak intensities manifests phase competition in the second Landau level.
authors.affiliation: Department of Physics, Columbia University, New York, New York 10027, USA.
authors.forename: A L
authors.initials: AL
authors.lastname: Levy
authors.affiliation: Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany.|Nanosystems Initiative Munich (NIM), Munich, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Wurstbauer
authors.affiliation: Department of Physics, Columbia University, New York, New York 10027, USA.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Kuznetsova
authors.affiliation: Department of Physics, Columbia University, New York, New York 10027, USA.|Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA.
authors.forename: A
authors.initials: A
authors.lastname: Pinczuk
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: K W
authors.initials: KW
authors.lastname: West
authors.affiliation: Department of Physics and Astronomy, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.|School of Materials Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.|School of Electrical and Computer Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Manfra
authors.affiliation: School of Materials Engineering, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: G C
authors.initials: GC
authors.lastname: Gardner
authors.affiliation: Department of Physics and Astronomy, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Watson