When a laser irradiates onto bilayer graphene composed of different carbon isotopes, different phonon frequencies resulting from different atom weights lead to non‐overlapped Raman fingerprints for the two graphene layers, which provides an opportunity to study the strain and doping state of each layer in bilayer graphene that could not be differentiated through Raman spectroscopy previously. These findings are presented in article number 2000250 by Pei Zhao and co‐workers. – The article belongs to a selection of 12 articles (arranged at the beginning of this issue) on “Electronic Properties of Novel Materials”, being also part of a virtual issue on the same topic, presented at www.pss-b.com.

中文翻译：

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同位素标记辅助拉曼光谱研究双层石墨烯的热退火效应

当激光照射由不同碳同位素组成的双层石墨烯时，由于原子量不同而产生的不同声子频率会导致两层石墨烯层出现不重叠的拉曼指纹，这为研究双层中每一层的应变和掺杂状态提供了机会以前无法通过拉曼光谱区分的石墨烯。这些发现在Pei Zhao及其同事的文章2000250中进行了介绍。–该文章属于关于“新型材料的电子特性”的12篇文章（在本期开始时安排），属于该主题的虚拟文章的一部分，该文章在www.pss-b.com上进行了介绍。