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

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

arxiv: 1307.5366 · v1 · pith:YFAIK5H4new · submitted 2013-07-20 · ❄️ cond-mat.supr-con · cond-mat.str-el

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

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P. L. Kuhns

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords magneticcoexistencemicroscopicspincomponentdensityfoundincommensurate

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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.

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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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