Higher-energy composite fermion levels in the fractional quantum hall effect

Trevor D. Rhone, Dwipesh Majumder, Brian S. Dennis, Cyrus Hirjibehedin, Irene Dujovne, Javier G. Groshaus, Yann Gallais, Jainendra K. Jain, Sudhansu S. Mandal, Aron Pinczuk, Loren Pfeiffer, Ken West

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Even though composite fermions in the fractional quantum Hall liquid are well established, it is not yet known up to what energies they remain intact. We probe the high-energy spectrum of the 1/3 liquid directly by resonant inelastic light scattering, and report the observation of a large number of new collective modes. Supported by our theoretical calculations, we associate these with transitions across two or more composite fermions levels. The formation of quasiparticle levels up to high energies is direct evidence for the robustness of topological order in the fractional quantum Hall effect.

Original languageEnglish (US)
Article number096803
JournalPhysical review letters
Issue number9
StatePublished - Mar 4 2011

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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