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Peak effect and the transition from elastic to plastic depinning
- Authors
- Cha, Min-Chul; FERTIG, H.A.
- Issue Date
- Apr-1998
- Publisher
- AMERICAN PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.80, no.17, pp 3851 - 3854
- Pages
- 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 80
- Number
- 17
- Start Page
- 3851
- End Page
- 3854
- ISSN
- 0031-9007
1079-7114
- Abstract
- 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.
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