Microwave resonance of the reentrant insulating quantum Hall phases in the 1st excited Landau Level
arXiv:cond-mat/0411622 · doi:10.1103/PhysRevB.71.081301
Abstract
We present measurements of the real diagonal microwave conductivity of the reentrant insulating quantum Hall phases in the first excited Landau level at temperatures below 50 mK. A resonance is detected around filling factor $ν=2.58$ and weaker frequency dependence is seen at $ν=2.42$ and 2.28. These measurements are consistent with the formation of a bubble phase crystal centered around these $ν$ at very low temperatures.