利用高分辨率偏振太赫兹光谱研究$\alpha$-RuCl$_3$中磁子的磁场演化
强关联电子
2018-10-09 v2
摘要
Kitaev量子自旋液体(KSL)是一种理论预言的物质态,其分数化准粒子不同于玻色型磁子(有序磁体中的基本激发)。层状蜂窝状反铁磁体-RuCl是一种KSL候选材料,因为施加面内磁场可将其驱动至磁无序相,其中 T。本文中,我们通过高分辨率时域太赫兹(THz)光谱详细表征了该材料的磁激发谱。我们观察到两个尖锐的磁子共振,其频率和振幅作为外加磁场的函数表现出不连续性,以及在更高能量处的两个较宽峰。在Néel温度以下,我们发现当考虑蜂窝晶格的破畸变和结构性畴的存在时,线性自旋波理论能够解释谱的这些所有本质特征。
引用
@article{arxiv.1806.00855,
title = {Field evolution of magnons in $\alpha$-RuCl$_3$ by high-resolution polarized terahertz spectroscopy},
author = {Liang Wu and Arielle Little and Erik E. Aldape and Dylan Rees and Eric Thewalt and Paula Lampen-Kelley and Arnab Banerjee and Craig A. Bridges and Jiaqiang Yan and Derrick Boone and Shreyas Patankar and David Goldhaber-Golden and David Mandrus and Stephen E. Nagler and Ehud Altman and Joseph Orenstein},
journal= {arXiv preprint arXiv:1806.00855},
year = {2018}
}
备注
8 pages, 5 figures in the main text. Appendices are included at the end of the article