Strongly correlated $νtot=1$ state in an intrinsically density-matched electron bilayer system and its two-terminal resistance Available to Purchase

Utilizing an intrinsically density-matched double quantum well system, a two-terminal resistance of the strongly correlated total filling factor one $(νtot=1)$ state measuring $h/e2$ is determined. In contrast to conventional devices exhibiting the $νtot=1$ state exclusively in regions, where the densities are adjusted by biasing front and back gate electrodes, the intrinsic devices show the $νtot=1$ state without any external control. Moreover, the intrinsically density-matched systems allow for direct contacting of the $νtot=1$ quantum Hall edges. Transport measurements indicate that under the $νtot=1$ condition, both layers become indistinguishable.