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Crossover and coexistence of quasiparticle excitations in the fractional quantum Hall regime at nu <= 1/3

Hirjibehedin, CF; Pinczuk, A; Dennis, BS; Pfeiffer, LN; West, KW; (2003) Crossover and coexistence of quasiparticle excitations in the fractional quantum Hall regime at nu <= 1/3. PHYS REV LETT , 91 (18) , Article 186802. 10.1103/PhysRevLett.91.186802. Green open access

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Abstract

New low-lying excitations are observed by inelastic light scattering at filling factors nu=p/(phip+/-1) of the fractional quantum Hall regime with phi=4. Coexisting with these modes throughout the range nuless than or equal to1/3 are phi=2 excitations seen at 1/3. Both phi=2 and phi=4 excitations have distinct behaviors with temperature and filling factor. The abrupt first appearance of the new modes in the low-energy excitation spectrum at nuless than or similar to1/3 suggests a marked change in the quantum ground state on crossing the phi=2-->phi=4 boundary at nu=1/3.

Type: Article
Title: Crossover and coexistence of quasiparticle excitations in the fractional quantum Hall regime at nu <= 1/3
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.91.186802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.91.186802
Language: English
Additional information: © 2003 The American Physical Society
Keywords: FILLED LANDAU-LEVEL, COMPOSITE FERMIONS, COLLECTIVE EXCITATIONS, LIGHT-SCATTERING, EFFECTIVE-MASS, DENSITY, SPIN, ENHANCEMENT, SYSTEM, LIQUID
UCL classification: UCL
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: https://discovery.ucl.ac.uk/id/eprint/9265
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