PbCuTe$_2$O$_6$ 中接近量子临界点的自旋液体与铁电性
强关联电子
2021-11-22 v2
摘要
相互作用自旋间的几何阻挫与强量子涨落破坏了长程磁序，有利于如自旋液体等更奇异的状态。遵循这一指导原则，在准二维（quasi-2D）系统中确定了若干自旋液体候选体系。然而对于 3D，情况较不利，因为量子涨落减弱且竞争态变得更加相关。在此，我们报道了对 PbCuTeO 单晶和压粉样品的热力学、磁性和介电性质的全面研究，该材料是具有超钾晶格的 3D 阻挫量子自旋液体候选材料。尽管粉末样品的低温性质与最近提出的量子自旋液体态一致，单晶却揭示了更为奇异的行为。这些晶体在 处显示铁电序，伴随强晶格畸变，以及修饰的磁响应——仍与量子自旋液体一致——但有明显量子临界行为的迹象。
引用
@article{arxiv.2103.17175,
title = {Spin liquid and ferroelectricity close to a quantum critical point in PbCuTe$_2$O$_6$},
author = {Christian Thurn and Paul Eibisch and Arif Ata and Maximilian Winkler and Peter Lunkenheimer and István Kézsmárki and Ulrich Tutsch and Yohei Saito and Steffi Hartmann and Jan Zimmermann and Abanoub R. N. Hanna and A. T. M. Nazmul Islam and Shravani Chillal and Bella Lake and Bernd Wolf and Michael Lang},
journal= {arXiv preprint arXiv:2103.17175},
year = {2021}
}
备注
59 pages, 15 figures, This version of the article has been accepted for publication, after peer review but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online