Microscopic coexistence of a two-component incommensurate spin density wave with superconductivity in underdoped NaFe$_{0.983}$Co$_{0.017}$As

Sangwon Oh; A. M. Mounce; Jeongseop A. Lee; W. P. Halperin; C. L. Zhang; S. Carr; Pengcheng Dai; A. P. Reyes; P. L. Kuhns

doi:10.1103/PhysRevB.88.134518

Microscopic coexistence of a two-component incommensurate spin density wave with superconductivity in underdoped NaFe$_{0.983}$Co$_{0.017}$As

Superconductivity 2013-10-30 v1 Strongly Correlated Electrons

Authors: Sangwon Oh , A. M. Mounce , Jeongseop A. Lee , W. P. Halperin , C. L. Zhang , S. Carr , Pengcheng Dai , A. P. Reyes , P. L. Kuhns

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Abstract

We have performed $^{75}$ As and $^{23}$ Na nuclear magnetic resonance (NMR) measurements on a single crystal of NaFe $_{0.9835}$ Co $_{0.0165}$ As and found microscopic coexistence of superconductivity with a two-component spin density wave (SDW). Using $^{23}$ Na NMR we measured the spatial distribution of local magnetic fields. The SDW was found to be incommensurate with a major component having magnetic moment ( $\sim0.2\,\mu_B$ /Fe) and a smaller component with magnetic moment ( $\sim0.02\,\mu_B$ /Fe). Spin lattice relaxation experiments reveal that this coexistence occurs at a microscopic level.

Keywords

spin density wave superconductivity NMR NaFeAs microscopic coexistence incommensurate underdoped

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@article{arxiv.1307.5366,
  title  = {Microscopic coexistence of a two-component incommensurate spin density wave with superconductivity in underdoped NaFe$_{0.983}$Co$_{0.017}$As},
  author = {Sangwon Oh and A. M. Mounce and Jeongseop A. Lee and W. P. Halperin and C. L. Zhang and S. Carr and Pengcheng Dai and A. P. Reyes and P. L. Kuhns},
  journal= {arXiv preprint arXiv:1307.5366},
  year   = {2013}
}

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Microscopic coexistence of a two-component incommensurate spin density wave with superconductivity in underdoped NaFe$_{0.983}$Co$_{0.017}$As

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