Excitonic instabilities of 2D electron systems in quantum hall states

A. Pinczuk, B. S. Dennis, L. N. Pfeiffer, K. W. West, V. Pellegrini, A. S. Plaut

Research output: Contribution to journalArticlepeer-review

Abstract

We present a short summary of recent resonant inelastic light scattering research that revealed remarkable softenings of long wavelength intersubband spin-excitations of electron double-layers in even integer quantum Hall states. The mode softenings arise from enhanced exchange vertex-corrections, or excitonic bindings, in the quantum Hall states. The collapse of spin-excitations could be associated with a quantum phase transition to a broken symmetry phase in which the order parameter involves spin correlations between the layers.

Original languageEnglish (US)
Pages (from-to)571-574
Number of pages4
JournalPhysica Status Solidi (A) Applied Research
Volume164
Issue number1
DOIs
StatePublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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