Instability of vortex-antivortex interface in optimally-doped Ba(Fe_{1-x}Co_{x})_{2}As_{2}

Shyam Mohan; Yuji Tsuchiya; Yasuyuki Nakajima; Tsuyoshi Tamegai

doi:10.1103/PhysRevB.84.180504

Instability of vortex-antivortex interface in optimally-doped Ba(Fe_{1-x}Co_{x})_{2}As_{2}

Superconductivity 2015-05-30 v1

Authors: Shyam Mohan , Yuji Tsuchiya , Yasuyuki Nakajima , Tsuyoshi Tamegai

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Abstract

We explore the flux front patterns during virgin penetration and after remagnetization in the iron-based superconductor Ba(Fe_{1-x}Co_{x})_{2}As_{2}. After remagnetization we observe an instability characterized by turbulent dynamics at the vortex-antivortex boundary. Associated with the turbulent flux boundary a band of excess current density is observed. The turbulence is contrasted with the instability observed in the cuprate superconductors. Our results suggest turbulent instability at the vortex-antivortex interface may be a common feature in all remagnetized type-II superconductors.

Keywords

vortex-antivortex interface turbulent instability iron-based superconductor flux front patterns remagnetization type-II superconductor

Cite

@article{arxiv.1109.2703,
  title  = {Instability of vortex-antivortex interface in optimally-doped Ba(Fe_{1-x}Co_{x})_{2}As_{2}},
  author = {Shyam Mohan and Yuji Tsuchiya and Yasuyuki Nakajima and Tsuyoshi Tamegai},
  journal= {arXiv preprint arXiv:1109.2703},
  year   = {2015}
}

Comments

14 pages, 4 figures

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