Magnetotransport of Unidirectional Lateral Superlattice Around Half-Odd Filling of Landau Levels
A. Endo, M. Kawamura, S. Katsumoto, Y. Iye
unpublished
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Note: EP2DS14
We have studied magnetotransport of unidirectional lateral superlattice around half-odd filling
of Landau levels. For small enough period a=92 nm, intriguing features are observed around
two particular filling factors ¦Í=3/2 and 9/2: positive magnetoresistance and commensurability
oscillation of hole-based ¦Í=3/2 composite fermions, and new unknown structures around ¦Í=9/2
which might possibly be related to the theoretically-predicted charge density wave formation
at higher Landau levels. With slightly larger period a=115 nm, only incomplete signs of these
structures are observed.