中子散射观测到的CaFe2As2压力诱导体积塌缩四方相
超导电性
2008-11-25 v3 强关联电子
摘要
近期对铁砷超导家族的研究凸显了压力(无论是化学压力还是机械压力)在促进超导电性中的作用。本文报道CaFe2As2经历压力诱导相变,转变为非磁性、体积“塌缩”的四方相,并在较低温度下进入超导态。对塌缩结构的自旋极化总能计算表明,Fe磁矩本身也发生塌缩,这与中子衍射中未观测到磁有序的结果一致。
引用
@article{arxiv.0807.3032,
title = {Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering},
author = {A. Kreyssig and M. A. Green and Y. Lee and G. D. Samolyuk and P. Zajdel and J. W. Lynn and S. L. Bud'ko and M. S. Torikachvili and N. Ni and S. Nandi and J. Leao and S. J. Poulton and D. N. Argyriou and B. N. Harmon and P. C. Canfield and R. J. McQueeney and A. I. Goldman},
journal= {arXiv preprint arXiv:0807.3032},
year = {2008}
}
备注
accepted for publication in Phys. Rev. B