Quantum corrections to the conductance of AlGaAs/GaAs-based quasiballistic quantum wires

Quantum conductance corrections (QCCs) due to weak localization and interaction effects of quantum quasiballistic wires are investigated for the first time. At temperatures in the range 2 K<T<12 K a crossover of these corrections from one-dimensional behavior to zero-dimensional behavior is observed. It is shown that the phase coherence length in the wires studied is less than the length L _T =(ℏD/kT)^1/2 at all temperatures. It is found that the conventional theory of QCCs describes correctly the experimental temperature dependence of the QCCs but gives a much lower value than the experimental one. Pis’ma Zh. éksp. Teor. Fiz. 67, No. 12, 973–976 (25 June 1998) Published in English in the original Russian journal. Edited by Steve Torstveit.