Effects of Mechanical Strain on the Structure and Properties of 2D Materials and their Heterostructures (C02)

Brumme的项目将使用基于DFT的方法研究2DM和异质结构在应变场影响下的电子，光学和输运性质。他将专注于应变对单层和多层系统的影响。在多层样品中，单层内的不同应变状态可以用来打破某些对称性，例如双层2H-WSe 2中的反转对称性。这将使得能够在不同传输信道之间切换和/或允许谷自由度的调谐。此外，应变依赖的振动特性和拓扑相变将在这个项目中解决。

Brumme’s project will study the electronic, optical, and transport properties of 2DMs and heterostructures under the influence of strain fields using DFT-based methods. He will focus on the influence of strain on mono-and multilayer systems. In multilayer samples, different strain states within the single layers can be used to break certain symmetries such as the inversion symmetry in bilayer 2H-WSe2. This will enable the switching between different transport channels and/or allow for the tuning of the valley degree of freedom. Furthermore, strain-depending vibrational properties and topological phase transitions will be addressed in this project.