Related Experiment Video
Updated: Mar 26, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Optical Emission Spectroscopy Study of Competing Phases of Electrons in the Second Landau Level
A L Levy1, U Wurstbauer2,3, Y Y Kuznetsova1
1Department of Physics, Columbia University, New York, New York 10027, USA.
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.
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Emission Spectra
Molecular Spectroscopy: Absorption and Emission
Atomic Emission Spectroscopy: Overview
Atomic Emission Spectroscopy: Lab

