CONDUCTANCE FLUCTUATIONS IN QUANTUM WIRES WITH SPIN-ORBIT AND BOUNDARY-ROUGHNESS SCATTERING

Conductance fluctuations in quantum wires with spin-orbit interaction and in those with boundary-roughness scattering are studied. In a length region much smaller than the localization length, a strong spin-orbit interaction reduces the fluctuation nearly by 1/2 and boundary roughness causes fluctuations quite different from those for bulk scatterers. Once the localization effect becomes important, the fluctuations exhibit an almost universal length dependence if scaled by the localization length, irrespective of the kinds of scatterer and the symmetry of the system.