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arXiv 1307.5366cond-mat.supr-concond-mat.str-el
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欠掺杂NaFe $_{0.983}$ Co $_{0.017}$ As中两组分无公度自旋密度波与超导电性的微观共存

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

摘要:

我们进行了$^{75}$ As和$^{23}$ Na核磁共振(NMR)测量的单晶NaFe $_{0.9835}$ Co $_{0.0165}$ As和发现微观共存的超导性与两个组件的自旋密度波(SDW)。用$^{23}$ Na NMR测量了局部磁场的空间分布。发现SDW与具有磁矩的主要组分($\sim0.2\,μ_B$ /Fe)和具有磁矩的较小组分($\sim0.02\,μ_B$ /Fe)不相称。自旋晶格弛豫实验表明,这种共存发生在微观水平。

英文摘要:

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 ($\sim0.2\,μ_B$/Fe) and a smaller component with magnetic moment ($\sim0.02\,μ_B$/Fe). Spin lattice relaxation experiments reveal that this coexistence occurs at a microscopic level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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