Novel microwave resonance around integer Landau level fillings in unidirectional lateral superlattices

摘要

We have investigated microwave conductivity of unidirectonal lateral superlattices (ULSLs). In the vicinity of the v velence 2 quantum Hall state, striking microwave resonance is observed on the sample having the modulation along the rf electric field, while no resonance is discerned on the samples without modulation or with the modulation perpendicular to the rf electric field.