杂质对 BaFe$_2$As$_2$ 一级自旋密度波转变影响的微观研究
强关联电子
2009-01-01 v4 超导电性
摘要
我们报道了对单晶和多晶形式 BaFeAs 的 As NMR 研究。我们发现，单晶中的 Sn 杂质显著改变了低能自旋涨落，并将有序化温度从 138 K 抑制至 85 K。与不含 Sn 的样品相比，我们发现 As NMR 谱和自旋晶格弛豫率的温度依赖性揭示了一个向非共格磁有序态转变的二级相变。
引用
@article{arxiv.0807.1084,
title = {Microscopic study of the effect of impurities on the first order spin density wave transition in BaFe$_2$As$_2$},
author = {S. -H. Baek and T. Klimczuk and F. Ronning and E. D. Bauer and J. D. Thompson and N. J. Curro},
journal= {arXiv preprint arXiv:0807.1084},
year = {2009}
}
备注
4 pages, 4 figures ; extensive and significant changes have been made to the previous version, focusing on the effect of impurities on the intrinsic physics