Normal-superconducting phase transition mimicked by current noise

Energy dependence of current noise in superconducting/normal metal junctions.

Interference of electronic waves undergoing Andreev reflection in diffusive conductors determines the energy profile of the conductance on the scale of the Thouless energy. A similar dependence exists in the current noise, but its behavior is known only in a few limiting cases. We consider a metallic diffusive wire connected to a superconducting reservoir through an interface characterized by a...

Current redistribution around the superconducting-to-normal transition in superconducting Nb-Ti Rutherford cables

Abstract. Sufficient thermal-electromagnetic stability against external heat sources is an essential design criterion for superconducting Rutherford cables, especially if operated close to the critical current. Due to the complex phenomena contributing to stability such as helium cooling, inter-strand current and heat transfer, its level is difficult to quantify. In order to improve our underst...

Phase transition of the dry friction between crystalline surfaces induced by normal load

A major source of energy dissipation and surface wear is the kinetic friction at the interfaces of sliding bodies. Traditionally, on a macroscopic scale, this undesirable effect is reduced with lubricating the surfaces by introducing oil into their interface. An interesting phenomenon, called superlubricity, has been reported on a nanometer scale where dry (without lubricant oil) fruition and w...

Critical Fluctuations in Normal-to-superconducting Transition

Critical Fluctuations in Normal-to-superconducting Transition