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Microscopic Theory of the Reentrant IQHE in the First and Second Excited LLs

M. O. Goerbig, P. Lederer, C. Morais Smith

cond-mat.mes-hallarXiv:cond-mat/0306286

Abstract

We present a microscopic theory for the recently observed reentrant integral quantum Hall effect in the n=1 and n=2 Landau levels. Our energy investigations indicate an alternating sequence of M-electron-bubble and quantum-liquid ground states in a certain range of the partial filling factor of the n-th level. Whereas the quantum-liquid states display the fractional quantum Hall effect, the bubble phases are insulating, and the Hall resistance is thus quantized at integral values of the total filling factor.

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