Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications.
Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications.
复制标题
2D半导体和石墨烯的应变工程：从应变场到带结构调整和光子应用。
DOI：
10.1038/s41377-020-00421-5
复制
发表时间：
2020-11-23
期刊：
影响因子：
--
通讯作者：
Lei D
中科院分区：
文献类型：
--
作者：
Peng Z;Chen X;Fan Y;Srolovitz DJ;Lei D
二维（2D）过渡金属二硫族化合物（TMDCs）和石墨烯组成了一个新的晶体材料家族，具有原子厚度和奇异的机械、电子和光学特性。由于其固有的优异的机械柔韧性和强度，这些二维材料为应变工程提供了理想的平台，实现了多功能调制和光学特性的显着增强。例如，最近的理论和实验研究表明，通过施加外部应变，如单轴应变和双轴应变，可以灵活地控制它们的电子状态。同时，许多非破坏性光学测量方法，通常包括吸收、反射、光致发光和拉曼光谱，可以很容易地用于定量确定应变工程光学特性。本文首先介绍了晶体弹性的宏观理论和应变场耦合的微观有效低能哈密顿量，然后总结了二维TMDCs和石墨烯的应变诱导光学响应的最新进展，其次是应变工程技术。它总结了与应变二维材料相关的令人兴奋的应用，对现有开放问题的讨论，以及对这一有趣的新兴领域的展望。本文综述了应变诱导二维（2D）材料新光学响应的最新进展，总结了与应变工程二维材料相关的各种应用。该综述由香港城市大学的雷当远及其同事与香港理工大学的一名研究人员合作进行，首先简要介绍了晶体弹性的宏观理论以及外部应变如何影响二维材料的物理和光学特性。然后总结了在二维材料（包括TMDCs和石墨烯）中应用外部应变的最新进展，可以用来修改其独特的物理和光学性质，然后总结了应变工程技术。该综述最后强调了与应变二维材料相关的一些特殊应用，如高灵敏度光学谐振器和柔性电子设备。
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) and graphene compose a new family of crystalline materials with atomic thicknesses and exotic mechanical, electronic, and optical properties. Due to their inherent exceptional mechanical flexibility and strength, these 2D materials provide an ideal platform for strain engineering, enabling versatile modulation and significant enhancement of their optical properties. For instance, recent theoretical and experimental investigations have demonstrated flexible control over their electronic states via application of external strains, such as uniaxial strain and biaxial strain. Meanwhile, many nondestructive optical measurement methods, typically including absorption, reflectance, photoluminescence, and Raman spectroscopies, can be readily exploited to quantitatively determine strain-engineered optical properties. This review begins with an introduction to the macroscopic theory of crystal elasticity and microscopic effective low-energy Hamiltonians coupled with strain fields, and then summarizes recent advances in strain-induced optical responses of 2D TMDCs and graphene, followed by the strain engineering techniques. It concludes with exciting applications associated with strained 2D materials, discussions on existing open questions, and an outlook on this intriguing emerging field. A review of recent advances in strain-induced new optical responses of two-dimensional (2D) materials concludes with various applications associated with strain-engineered 2D materials. The review, conducted by Dangyuan Lei and colleagues at The City University of Hong Kong, in collaboration with a researcher from The Hong Kong Polytechnic University, first provides a brief introduction to the macroscopic theory of crystal elasticity and how external strain affects the physical and optical properties of 2D materials. It then summarizes how recent advances in the application of external strains in 2D materials, including TMDCs and graphene, can be used to modify their unique physical and optical properties, followed by a summary of strain engineering techniques. The review concludes by highlighting some of the peculiar applications associated with strained 2D materials, such as high-sensitivity optical resonators and flexible electronic devices.
登录
查看更多内容
影响因子：
16.6
作者：
Branny A;Kumar S;Proux R;Gerardot BD
通讯作者：
Gerardot BD
影响因子：
56.9
作者：
Britnell, L.;Ribeiro, R. M.;Novoselov, K. S.
通讯作者：
Novoselov, K. S.
影响因子：
29.4
作者：
Castellanos-Gomez, Andres;Poot, Menno;Rubio-Bollinger, Gabino
通讯作者：
Rubio-Bollinger, Gabino
影响因子：
2.5
作者：
Chakraborty, Biswanath;Matte, H. S. S. Ramakrishna;Rao, C. N. R.
通讯作者：
Rao, C. N. R.
影响因子：
56.9
作者：
Bunch, J. Scott;van der Zande, Arend M.;McEuen, Paul L.
通讯作者：
McEuen, Paul L.