S=1/2 kagome反铁磁体herbertsmithite中的无标度反铁磁涨落
强关联电子
2009-12-21 v4
摘要
对近理想的s=1/2 kagome反铁磁体herbertsmithite [ZnCu3 (OH)6Cl2]的中子谱学与漫中子散射研究，揭示了量子自旋液体的标志特性：在不存在时间平均有序矩的情况下，具有瞬态短程反铁磁关联。这些动态反铁磁关联仅极微弱地依赖于中子能量转移和温度，并持续存在至25 meV与120 K。在低能转移下，观察到随温度升高磁散射向低Q偏移，这为无能隙自旋子提供了证据。本文论证这些观测结果为（掺杂）莫特绝缘体的RVB理论提供了重要证据。
引用
@article{arxiv.0902.3194,
title = {Scale-free antiferromagnetic fluctuations in the S=1/2 kagome antiferromagnet herbertsmithite},
author = {M. A. de Vries and J. R. Stewart and P. P. Deen and J. O. Piatek and G. J. Nilsen and H. M. Ronnow and A. Harrison},
journal= {arXiv preprint arXiv:0902.3194},
year = {2009}
}
备注
Paper as published in Physics Review Letters. One figure with new data has been added and text has changed to improve clarity and to include discussion of the new data. 4 pages, 3 figures