Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors

Jiun-Haw Chu; James G. Analytis; Kristiaan De Greve; Peter L. McMahon; Zahirul Islam; Yoshihisa Yamamoto; Ian R. Fisher

doi:10.1126/science.1190482

Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors

Superconductivity 2010-08-20 v2

Authors: Jiun-Haw Chu , James G. Analytis , Kristiaan De Greve , Peter L. McMahon , Zahirul Islam , Yoshihisa Yamamoto , Ian R. Fisher

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Abstract

Electrical resistivity measurements of detwinned single crystals of the representative iron arsenide Ba(Fe $_{1-x}$ Co $_x$ ) $_2$ As $_2$ reveal a dramatic in-plane anisotropy associated with the tetragonal-to-orthorhombic structural transition that precedes the onset of long-range antiferromagnetic order. These results indicate that the structural transition in this family of compounds is fundamentally electronic in origin.

Keywords

iron pnictide superconductors nematic phase transition electronic nematicity structural transition resistivity anisotropy underdoped

Cite

@article{arxiv.1002.3364,
  title  = {Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors},
  author = {Jiun-Haw Chu and James G. Analytis and Kristiaan De Greve and Peter L. McMahon and Zahirul Islam and Yoshihisa Yamamoto and Ian R. Fisher},
  journal= {arXiv preprint arXiv:1002.3364},
  year   = {2010}
}

Comments

5 pages, 4 figures

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