- Tytuł:
- Skyrmions and the ν=1 Quantum Hall Ferromagnet
- Autorzy:
-
Manfra, M. J.
Goldberg, B. B.
Pfeiffer, L.
West, K. - Powiązania:
- https://bibliotekanauki.pl/articles/1967963.pdf
- Data publikacji:
- 1997-10
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
73.40.Hm
78.66.-w
73.20.Mf
71.70.Gm
73.20.Dx - Opis:
- Recent experimental and theoretical investigations have resulted in a shift in our understanding of the ν=1 quantum Hall state. There now exists a wealth of evidence that the excitation gap and the resulting quasiparticle spectrum at ν=1 are due predominately to the ferromagnetic many-body exchange interaction. A great variety of experimentally observed correlations at ν= 1 cannot be incorporated into a perturbative expansion around the single-particle model, a scheme long thought to describe the integral quantum Hall effect at filling factor 1. Theorists now refer to the ν=1 state as the quantum Hall ferromagnet. In this paper we review recent theoretical and experimental progress and detail our own optical investigations of the ν= 1 quantum Hall regime. The technique of magneto-absorption spectroscopy has proven to be powerful a probe of the occupancy of the lowest Landau level in the regime of 0.7<ν<1.3 about the spin gap. Additionally, we have performed simultaneous measurements of the absorption, photoluminescence and photoluminescence excitation spectra of the ν=1 state in order to elucidate the role of excitonic and relaxation effects in optical spectroscopy in the quantum Hall regime.
- Źródło:
-
Acta Physica Polonica A; 1997, 92, 4; 621-632
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł