Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2.,Nature Communications

当前位置： X-MOL 学术 › Nat. Commun. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2.
Nature Communications ( IF 14.7 ) Pub Date : 2020-03-06 , DOI: 10.1038/s41467-020-15079-1
Quirin Stahl ₁ , Maximilian Kusch ₁ , Florian Heinsch _{1,

2} , Gaston Garbarino ₃ , Norman Kretzschmar ₃ , Kerstin Hanff ₄ , Kai Rossnagel _{4,

5,

6} , Jochen Geck _{1,

7} , Tobias Ritschel ₁

Affiliation

Photo-induced switching between collective quantum states of matter is a fascinating rising field with exciting opportunities for novel technologies. Presently, very intensively studied examples in this regard are nanometer-thick single crystals of the layered material 1T-TaS2, where picosecond laser pulses can trigger a fully reversible insulator-to-metal transition (IMT). This IMT is believed to be connected to the switching between metastable collective quantum states, but the microscopic nature of this so-called hidden quantum state remained largely elusive up to now. Here, we characterize the hidden quantum state of 1T-TaS2 by means of state-of-the-art x-ray diffraction and show that the laser-driven IMT involves a marked rearrangement of the charge and orbital order in the direction perpendicular to the TaS2-layers. More specifically, we identify the collapse of interlayer molecular orbital dimers as a key mechanism for this non-thermal collective transition between two truly long-range ordered electronic crystals.

中文翻译：

在1T-TaS2的光诱导隐藏状态下层二聚化的崩溃。

物质的集体量子态之间的光诱导转换是一个引人入胜的新兴领域，为新技术带来了令人兴奋的机会。目前，在这方面进行了深入研究的示例是层状材料1T-TaS2的纳米厚单晶，其中皮秒激光脉冲可以触发完全可逆的绝缘体到金属的过渡（IMT）。人们认为这种IMT与亚稳态集体量子态之间的转换有关，但是直到现在，这种所谓的隐藏量子态的微观性质仍然难以捉摸。在这里，我们通过最新的X射线衍射来表征1T-TaS2的隐藏量子态，并显示出激光驱动的IMT涉及垂直于该方向的方向上电荷和轨道顺序的显着重排。 TaS2层。进一步来说，

更新日期：2020-03-06

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南