Weak localisation theory for lightly doped semiconductor quantum wires

摘要: A weak localisation theory for a semiconductor quantum wire, which has width of the order Fermi wavelength, is presented. In our model electronic motion essentially one-dimensional and length L, much larger than mean free path I, so that, in contrast to conventional theories non-localised wire with total L conductance depends on instead L,, implying temperature independent behaviour. Our explains recent experiments found transport behaviour at very low tem- perature narrow AlGaAs/GaAs wire. studying AC conductivity, calculation predicts > there exists critical value frequency above system delocalised conductivity a(w) rises as w2.