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Higher-Energy Composite Fermion Levels in the Fractional Quantum Hall Effect

Rhone, TD; Majumder, D; Dennis, BS; Hirjibehedin, C; Dujovne, I; Groshaus, JG; Gallais, Y; ... West, K; + view all (2011) Higher-Energy Composite Fermion Levels in the Fractional Quantum Hall Effect. PHYS REV LETT , 106 (9) , Article 096803. 10.1103/PhysRevLett.106.096803. Green open access

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Abstract

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.

Type: Article
Title: Higher-Energy Composite Fermion Levels in the Fractional Quantum Hall Effect
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.106.096803
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.106.096803
Language: English
Additional information: © 2011 American Physical Society
Keywords: MAGNETIC-FIELDS, EXCITATIONS, STATE, SPECTRUM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1318956
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