Fractionally charged skyrmions in fractional quantum Hall effect
Identifieur interne : 000113 ( Main/Exploration ); précédent : 000112; suivant : 000114Fractionally charged skyrmions in fractional quantum Hall effect
Auteurs : Ajit C. Balram [États-Unis] ; U. Wurstbauer [Allemagne] ; A. W Js [Pologne] ; A. Pinczuk [États-Unis] ; J. K. Jain [États-Unis]Source :
- Nature Communications [ 2041-1723 ] ; 2015.
Abstract
The fractional quantum Hall effect has inspired searches for exotic emergent topological particles, such as fractionally charged excitations, composite fermions, abelian and nonabelian anyons and Majorana fermions. Fractionally charged skyrmions, which support both topological charge and topological vortex-like spin structure, have also been predicted to occur in the vicinity of 1/3 filling of the lowest Landau level. The fractional skyrmions, however, are anticipated to be exceedingly fragile, suppressed by very small Zeeman energies. Here we show that, slightly away from 1/3 filling, the smallest manifestations of the fractional skyrmion exist in the excitation spectrum for a broad range of Zeeman energies, and appear in resonant inelastic light scattering experiments as well-defined resonances slightly below the long wavelength spin wave mode. The spectroscopy of these exotic bound states serves as a sensitive tool for investigating the residual interaction between composite fermions, responsible for delicate new fractional quantum Hall states in this filling factor region.
Url:
DOI: 10.1038/ncomms9981
PubMed: 26608906
PubMed Central: 4674824
Affiliations:
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Balram</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Department of Physics, 104 Davey Lab, Pennsylvania State University</institution>, University Park, Pennsylvania 16802,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Wurstbauer, U" sort="Wurstbauer, U" uniqKey="Wurstbauer U" first="U." last="Wurstbauer">U. Wurstbauer</name><affiliation wicri:level="1"><nlm:aff id="a2"><institution>Walter Schottky Institut and Physik-Department, Am Coulombwall 4a, Technische Universität München</institution>, D-85748 Garching,<country>Germany</country></nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="a3"><institution>Nanosystems Initiative Munich (NIM)</institution>, Schellingstraße 4, 80799 München,<country>Germany</country></nlm:aff><country xml:lang="fr">Allemagne</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="W Js, A" sort="W Js, A" uniqKey="W Js A" first="A." last="W Js">A. W Js</name><affiliation wicri:level="1"><nlm:aff id="a4"><institution>Department of Theoretical Physics, Wrocław University of Technology</institution>, 50-370 Wrocław,<country>Poland</country></nlm:aff><country xml:lang="fr">Pologne</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Pinczuk, A" sort="Pinczuk, A" uniqKey="Pinczuk A" first="A." last="Pinczuk">A. Pinczuk</name><affiliation wicri:level="1"><nlm:aff id="a5"><institution>Department of Applied Physics and Applied Mathematics and Department of Physics, Columbia University</institution>, New York 10027,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Jain, J K" sort="Jain, J K" uniqKey="Jain J" first="J. K." last="Jain">J. K. Jain</name><affiliation wicri:level="1"><nlm:aff id="a1"><institution>Department of Physics, 104 Davey Lab, Pennsylvania State University</institution>, University Park, Pennsylvania 16802,<country>USA</country></nlm:aff><country xml:lang="fr">États-Unis</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Nature Communications</title><idno type="eISSN">2041-1723</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The fractional quantum Hall effect has inspired searches for exotic emergent topological particles, such as fractionally charged excitations, composite fermions, abelian and nonabelian anyons and Majorana fermions. Fractionally charged skyrmions, which support both topological charge and topological vortex-like spin structure, have also been predicted to occur in the vicinity of 1/3 filling of the lowest Landau level. The fractional skyrmions, however, are anticipated to be exceedingly fragile, suppressed by very small Zeeman energies. Here we show that, slightly away from 1/3 filling, the smallest manifestations of the fractional skyrmion exist in the excitation spectrum for a broad range of Zeeman energies, and appear in resonant inelastic light scattering experiments as well-defined resonances slightly below the long wavelength spin wave mode. The spectroscopy of these exotic bound states serves as a sensitive tool for investigating the residual interaction between composite fermions, responsible for delicate new fractional quantum Hall states in this filling factor region.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Sondhi, S L" uniqKey="Sondhi S">S. L. Sondhi</name></author><author><name sortKey="Karlhede, A" uniqKey="Karlhede A">A. Karlhede</name></author><author><name sortKey="Kivelson, S A" uniqKey="Kivelson S">S. A. Kivelson</name></author><author><name sortKey="Rezayi, E H" uniqKey="Rezayi E">E. H. Rezayi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fertig, H A" uniqKey="Fertig H">H. A. Fertig</name></author><author><name sortKey="Brey, L" uniqKey="Brey L">L. Brey</name></author><author><name sortKey="Cote, R" uniqKey="Cote R">R. Côté</name></author><author><name sortKey="Macdonald, A H" uniqKey="Macdonald A">A. H. 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