Abstract
Employing an array of shallow etched trenches aligned transverse to current flow, we have fabricated long (1– 2 μm ) split-gate quantum wires with weak periodic potential modulation on a GaAs/AlGaAs 2DEG wafer, thereby realizing a 1D Bragg reflector at a very low temperature. In the presence of the first and second edge states, i.e. in the Fermi liquid regime, we observe two groups of conductance dips due to the spin-separate reflection resonances. On the other hand, in the weak magnetic field range, we observe a dip of conductance with temperature as a signature of the Tomonaga–Luttinger liquid effects.
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