Minuscule vibrations;  uncovered

doi:10.1126/science.adz7157

2025-07-24

PRE

Toma Susi

DOI：10.1126/science.adz7157

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摘要

En 中文

扭曲异质结构——由两层原子级薄材料通过范德华力以一定角度堆叠而成——表现出超出单一层特性的奇异性质，例如超导电性（1, 2）。层间相互作用导致层内原子发生结构重构，形成莫尔超晶格。该晶格具有独特的振动模式，称为莫尔声子（或相子），这些模式会影响材料的性质（3, 4）。然而，由于能量低（约0.01 meV）和纳米级空间变化，使用现有技术表征相子极为困难。本期第423页，张等人（5）报道了使用一种计算成像技术——电子像衬断层扫描术——来表征二硒化钨扭曲双层中的相子。该研究结果表明，电子像衬断层扫描术提供的极高空间分辨率能够为否则难以研究的现象提供洞察。

Keyword:

twisted heterostructures

Moiré superlattice

phasons

electron ptychography

tungsten diselenide

期刊

Science

IF:

45.8

论文数:

1.4W

被引数:

78.6W

机构

University of Vienna

学者数:

1.7W

论文数: 1.6W

被引数: 40

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