Instabilities in the vortex matter and the peak effect phenomenon

Shyam Mohan; Jaivardhan Sinha; S. S. Banerjee; Yuri Myasoedov

Instabilities in the vortex matter and the peak effect phenomenon

Superconductivity 2007-05-23 v1

Authors: Shyam Mohan , Jaivardhan Sinha , S. S. Banerjee , Yuri Myasoedov

Abstract

In single crystals of 2H-NbSe2, we identify for the first time a crossover from weak collective to strong pinning regime in the vortex state which is not associated with the peak effect phenomenon. Instead, we find the crossover is associated with anomalous history dependent magnetization response. In the field (Bdc) - temperature (T) vortex matter phase diagram we demarcate this pinning crossover boundary. We also delineate another boundary which separates the strong pinning region from a thermal fluctuation dominated regime, and find that PE appears on this boundary.

Keywords

vortex physics in superconductors vortex matter in superconductors superconductivity

Cite

@article{arxiv.cond-mat/0701106,
  title  = {Instabilities in the vortex matter and the peak effect phenomenon},
  author = {Shyam Mohan and Jaivardhan Sinha and S. S. Banerjee and Yuri Myasoedov},
  journal= {arXiv preprint arXiv:cond-mat/0701106},
  year   = {2007}
}

Comments

17 pages of text including figures (4 nos.). Paper accepted for publication in Physical Review Letters (expected date Jan 12, 2007 issue)

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