LiFeAs正常态的反铁磁涨落
超导电性
2010-05-03 v2 强关联电子
摘要
我们对化学计量比多晶LiFeAs正常态的75As NMR奈特位移和自旋-晶格弛豫率进行了详细研究。我们对Korringa关系的分析表明,如果转移超精细耦合是75As核与Fe电子自旋之间的主导相互作用,则LiFeAs表现出强烈的反铁磁涨落;而对于在位超精细耦合情形,这些涨落较弱,但仍足以解释我们的实验观测。电场梯度的密度泛函计算正确地再现了75As和7Li两个位置的实验值。
引用
@article{arxiv.0912.0692,
title = {Antiferromagnetic fluctuations in the normal state of LiFeAs},
author = {P. Jeglic and A. Potocnik and M. Klanjsek and M. Bobnar and M. Jagodic and K. Koch and H. Rosner and S. Margadonna and B. Lv and A. M. Guloy and D. Arcon},
journal= {arXiv preprint arXiv:0912.0692},
year = {2010}
}
备注
5 pages, 3 figures, thoroughly revised version with refined experimental data, accepted for publication as a Rapid Communication in Physical Review B.