1D Bragg reflector in the Tomonaga–Luttinger liquid regime and Fermi liquid regimes

Employing an array of shallow etched trenches aligned transverse to current flow, we have fabricated long (1–View the MathML source) 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.