Enhanced superfluid density on twin boundaries in Ba(Fe1-xCox)2As2

Beena Kalisky; John R. Kirtley; James G. Analytis; Jiun-Haw Chu; Arturas Vailionis; Ian R. Fisher; Kathryn A. Moler

doi:10.1103/PhysRevB.81.184513

Enhanced superfluid density on twin boundaries in Ba(Fe1-xCox)2As2

Superconductivity 2013-05-29 v2

Authors: Beena Kalisky , John R. Kirtley , James G. Analytis , Jiun-Haw Chu , Arturas Vailionis , Ian R. Fisher , Kathryn A. Moler

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Abstract

Superconducting quantum interference device (SQUID) microscopy shows stripes of increased diamagnetic susceptibility in underdoped, but not overdoped, single crystals of Ba(Fe1-xCox)2As2. These stripes of increased diamagnetic susceptibility are consistent with enhanced superfluid density on twin boundaries. Individual vortices avoid pinning on or crossing the stripes, and prefer to travel parallel to them. These results indicate a relationship between superfluid density, local strain, and frustrated magnetism, and demonstrate two mechanisms for enhancing critical currents.

Keywords

high-temperature superconductivity superconductivity

Cite

@article{arxiv.0906.5184,
  title  = {Enhanced superfluid density on twin boundaries in Ba(Fe1-xCox)2As2},
  author = {Beena Kalisky and John R. Kirtley and James G. Analytis and Jiun-Haw Chu and Arturas Vailionis and Ian R. Fisher and Kathryn A. Moler},
  journal= {arXiv preprint arXiv:0906.5184},
  year   = {2013}
}

Comments

16 pages, 4 figures

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