Peak Effect and the Transition from Elastic to Plastic Depinning

Дата и время публикации : 1998-03-04T13:45:02Z

Авторы публикации и институты :
Min-Chul Cha
H. A. Fertig

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 4 pages, 5 figures. To appear in Physical Review Letters
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con, cond-mat.mtrl-sci

Краткий обзор статьи: We demonstrate for the first time an observation of the peak effect in simulations of magnetic vortices in a superconductor. The shear modulus $c_{66}$ of the vortex lattice is tuned by adding a fictitious {attractive} short range potential to the usual long-range repulsion between vortices. The peak effect is found to be most pronounced in low densities of pinning centers, and is always associated with a transition from elastic to plastic depinning. The simulations suggest in some situations that over a range of values of $c_{66}$ the production of lattice defects by a driving force enhances the pinning of the lattice.

Category: Physics