Zero-bias transport anomaly in metallic nanobridges: Magnetic field   dependence and universal conductance fluctuations
  We present data of transport measurements through a metallic nanobridge exhibiting diffusive electron transport. A logarithmic temperature dependence and a zero-bias anomaly in the differential conductance are observed, independent of magnetic field. The data can be described by a single scaling law. The theory of electron-electron interaction in disordered systems, adapted to the case of finite-size systems in non-equilibrium, yields quantitative agreement with experiment. Measurements of universal conductance functuations support the assumptions of the theory about the electronic phase coherence. 
H. B. Weber (1), R. H\"aussler (2), H. v. L\"ohneysen (1,2), and J.   Kroha (3) ((1) Forschungszentrum Karlsruhe, INT; (2) P...