作者
N d'Ambrumenil, AM Reynolds
发表日期
1988/1/10
期刊
Journal of Physics C: Solid State Physics
卷号
21
期号
1
页码范围
119
出版商
IOP Publishing
简介
The authors discuss the existence of fractional quantised Hall states in other than the lowest (n= 0) Landau level. They present the results of numerical studies of systems with up to nine particles in the n= 1 Landau level. They find that a fractional quantised Hall state is likely for filling fractions of the n= 1 Landau level, nu 1, with nu 1-1= 5. At nu 1-1= 3 they find that the Laughlin trial wavefunctions is not a good candidate ground-state wavefunction. If there is a gap at nu 1-1 it is predicted to be small. At nu 1-1= 7/2 they predict the existence of a fractional quantised Hall state despite the small or non-existent gap at nu 1-1= 3. They also show that introducing truncated pseudopotential interactions is not always a physical procedure outside of the lowest Landau level.
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N d'Ambrumenil, AM Reynolds - Journal of Physics C: Solid State Physics, 1988