Correlation effects mediated by disorders in one-dimensional channels

We report nonlinear transport in one-dimensional quantum wires formed in a GaAs/AlGaAs heterostructure. The two-terminal conductance characteristics were investigated under varying electron concentrations with and without a large in-plane magnetic field of 10 T. One important observation was that the 0.7-like feature was identified at higher-order subbands, specifically ∼ 1.6 G 0 , ∼ 3.7 G 0 , and ∼ 4.7 G 0 . Additionally, our findings reveal the emergence of two conductance states appearing below e 2 / h under large dc bias voltage, where these states become more pronounced together with higher 0.7-like features, as electron concentration decreases, highlighting the influence of strong correlation effects in their formation. The weak Zeeman splitting in the ground state despite a large in-plane magnetic field of 10 T in low-density and weakly confined regime indicates disordered-induced correlation effects dominating the mechanism.