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Transition from free to interacting composite fermions away from nu=1/3

Gallais, Y; Kirschenmann, TH; Dujovne, I; Hirjibehedin, CF; Pinczuk, A; Dennis, BS; Pfeiffer, LN; (2006) Transition from free to interacting composite fermions away from nu=1/3. PHYS REV LETT , 97 (3) , Article 036804. 10.1103/PhysRevLett.97.036804. Green open access

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Abstract

Spin excitations from a partially populated composite fermion level are studied above and below nu=1/3. In the range 2/7 <nu < 2/5, the experiments uncover significant departures from the noninteracting composite fermion picture that demonstrate the increasing impact of interactions as quasiparticle Landau levels are filled. The observed onset of a transition from free to interacting composite fermions could be linked to condensation into the higher order states suggested by transport experiments and numerical evaluations performed in the same filling factor range.

Type: Article
Title: Transition from free to interacting composite fermions away from nu=1/3
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.97.036804
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.97.036804
Language: English
Additional information: © 2006 The American Physical Society
Keywords: QUANTUM HALL SYSTEMS, HIERARCHY, STATES
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/103146
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