Anomalous Gap Reversal of the $3+1/3$ and $3+1/5$ Fractional Quantum Hall States

Ethan Kleinbaum, Ashwani Kumar, L. N. Pfeiffer +2

In this work we report the opening of an energy gap at the filling factor $\nu =3+1/3$, firmly establishing the ground state as a fractional quantum Hall state. This and other odd-den…