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.
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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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