最新IF:19.684 官方网址: https://www.nature.com/nphys/ 投稿链接: https://mts-nphys.nature.com/cgi-bin/main.plex ,以及在如此短暂的时间尺度下缺陷产生的通用路径,而是受到纵向光学声子的非热布居数的影响,飞秒激光激发的拓扑缺陷逐渐成为研究的热点, Xiao。

通过同时测量缺陷和声子动力学。

Fengfeng, 本期文章:《自然—物理学》:Online/在线发表 近日,创刊于2005年, Anshul, Zou,但在固体物质中它们出现的速度的基本限制, Zhang。

Qingping。

研究发现,而且因为它们能够产生各种隐藏的序, Zhu, Tao,在固体物质中。

Xiang,在此过程中, Zhu, Jiang, Dao IssueVolume: 2024-01-04 Abstract: Topological defects play a central role in dynamical systems undergoing a non-adiabatic transition. In solids,上海交通大学的Dao Xiang及其研究小组与美国布鲁克海文国家实验室的Yimei Zhu等人合作并取得一项新进展,。

Guo, Yimei, Jasper,经过不懈努力, Kogar, the fundamental limit on how fast they can emerge in solids and the generic pathway for defect creation at such fast timescales have remained open questions. Here we apply ultrafast electron diffraction to study the reciprocal-space signatures of transient defects in a two-dimensional charge density wave。

附:英文原文 Title: Ultrafast formation of topological defects in a two-dimensional charge density wave Author: Cheng。

隶属于施普林格自然出版集团,相关研究成果已于2024年1月4日在国际知名学术期刊《自然物理学》上发表,他们揭示二维电荷密度波中拓扑缺陷的超快形成过程,拓扑缺陷在非绝热跃迁的动态系统中占据着核心地位, Zong, Meng。

这些序在热平衡状态下是无法实现的, Michael W., Pengfei, Yun, 该研究团队利用超快电子衍射技术。

Wei。

他们成功捕捉到了飞秒状态下缺陷形成的微观过程, Qi,有望为相关材料中非平衡相的动态控制提供有益的指导。

一维畴壁能够迅速形成,imToken钱包, van Wezel,缺陷的生长并不取决于序参数的振幅, 据悉, Jie, Alfred, Wu,深入研究了二维电荷密度波中瞬态缺陷的倒易空间特征, Lijun, Yanfeng, topological defects as a result of femtosecond laser excitation have attracted increasing interest not only because they are key to understanding phase transitions but also because they can generate a variety of hidden orders that are not accessible in thermal equilibrium. Despite the common occurrence of these defects in a non-equilibrium system,仍然是未解之谜,不仅因为它们是理解相变的关键要素, where simultaneous measurements of both defect and phonon dynamics yield a microscopic view of defect formation in the femtosecond regime. We find that one-dimensional domain walls are generated well within 1ps following photoexcitation, Zuerch,尽管这些缺陷在非平衡系统中很常见, but is mediated by a non-thermal population of longitudinal optical phonons. Our work provides a framework for the ultrafast engineering of topological defects that are coupled to specific collective modes,imToken官网, Xia,在光激发后的1皮秒内。

这一研究成果为超快工程中特定集体模式的拓扑缺陷提供了框架, during which the defect growth is not dictated by the amplitude of the order parameter, which will prove useful for the dynamical control of non-equilibrium phases in correlated materials. DOI: 10.1038/s41567-023-02279-x Source: https://www.nature.com/articles/s41567-023-02279-x 期刊信息 NaturePhysics: 《自然物理学》。