Even-denominator fractional quantum Hall state in conventional triple-gated quantum point contact

The even-denominator states have attracted considerable attention owing to their possible applications in future quantum technologies. In this letter, we first report a 3/2 diagonal resistance, indicating the existence of a 3/2 state in a nanometer-sized triple-gated quantum point contact (QPC) fabricated on a high-mobility (not ultra-high-mobility) single-layer two-dimensional (2D) GaAs wafer. The center gate plays a crucial role in realizing the QPC's 3/2 state. Our observation of the 3/2 state using a conventional QPC device, which is a suitable building block for semiconductor quantum devices, paves a new path for the development of semiconductor-based quantum technologies.

Automated summary

The 3/2 diagonal resistance discovered in a nanometer-sized triple-gated quantum point contact on a high-mobility single-layer two-dimensional GaAs wafer highlights the potential of even-denominator states in future quantum technologies. The crucial role of the center gate in realizing the QPC's 3/2 state and the use of conventional QPC devices as building blocks for semiconductor quantum devices signify a new path for the development of semiconductor-based quantum technologies.