Anomalous Magnons in a Quantum Hall Ferromagnet with Strong Interaction at Filling Factor 2

Anomalous Magnons in a Quantum Hall Ferromagnet with Strong Interaction at Filling Factor 2

In two-dimensional electronic systems, at large values of the Wigner–Seitz parameter r s , an anomalous branch of magnons was found. In a quantum Hall ferromagnet state with ν = 2, the magnon dispersion reveals a magnetoroton minimum with depth dependent on electron density. Magnetorotons with oppos...

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Veröffentlicht in:Bulletin of the Russian Academy of Sciences. Physics 2023-02, Vol.87 (2), p.133-137
Hauptverfasser: Van’kov, A. B., Koreyev, A. S., Berezhnoy, P. S., Kukushkin, I. V.
Format: Artikel
Sprache:eng
Schlagworte:
Electron density
Electronic systems
Ferromagnetism
Hadrons
Heavy Ions
Magnons
Nuclear Physics
Physics
Physics and Astronomy
Quantum Hall effect
Strong interactions (field theory)
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Zusammenfassung:In two-dimensional electronic systems, at large values of the Wigner–Seitz parameter r s , an anomalous branch of magnons was found. In a quantum Hall ferromagnet state with ν = 2, the magnon dispersion reveals a magnetoroton minimum with depth dependent on electron density. Magnetorotons with opposite momenta are shown to attract each other.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873822700794