Wave functions and other properties of spin-reversed quasiparticles at ν=1/ m Landau-level occupation
1991; American Physical Society; Volume: 43; Issue: 7 Linguagem: Inglês
10.1103/physrevb.43.5944
ISSN1095-3795
Autores Tópico(s)Magnetic properties of thin films
ResumoA family of wave functions appropriate for arbitrary-spin quasiparticles of the fully polarized, \ensuremath{\nu}=1/m incompressible fluid is constructed. The spectrum with spin degrees of freedom included, becomes more complex, and in particular, is shown to be massively degenerate (no Zeeman energy). As a result, for finite systems in the absence of Zeeman energy the absolute ground states for two sectors differing by one flux quantum are spin singlet and maximally polarized. I study the spectrum with two reversed spins near \ensuremath{\nu}=1 for up to 160 electrons and find the signature of this trend to persist in the thermodynamic limit. I also find that for all experimentally accessible magnetic field values, the single spin-reversed quasiparticle at \ensuremath{\nu}=1 is irrelevant and is preempted by quasiparticles having additional reversed spins.
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