The dynamics of disordered systems and the motion of vortices in disordered type-II superconductors

✍ Scribed by J. Müllers; A. Schmid

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 861 KB
• Volume: 507
• Category: Article
• ISSN: 0003-3804
• DOI: 10.1002/andp.19955070804

✦ Synopsis

We develop a field theoretical method which permits us to study the dynamics of interacting particles in disordered systems. In particular, making use of a Hartree-type approximation, we obtain a self-consistent system of equations for disorder averaged quantities. The method is first applied to a single particle on a rough surface. Then, we calculate the current-voltage (I-V) characteristics of a type-n superconductor in the flux flow regime. Finally, the structure of the steps is discussed which arise in the I-V-characteristics when a small ac field is superimposed on the constant voltage. These may serve as a probe for incipient melting of the vortex lattice.