Observation of Incompressibility at $ν=4/11$ and $ν=5/13$

The region of filling factors $1/3<ν<2/5$ is predicted to support new types of fractional quantum Hall states with topological order different from that of the Laughlin-Jain or the Moore-Read states. Incompressibility is a necessary condition for the formation of such novel topological states. We find that at 6.9~mK incompressibility develops only at $ν=4/11$ and $5/13$, while the states at $ν=6/17$ and $3/8$ remain compressible. Our observations at $ν=4/11$ and $5/13$ are first steps towards understanding emergent topological order in these fractional quantum Hall states.

No reviews yet.

No comments yet.