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

机械应变对二维材料及其异质结构结构和性能的影响（C02）

• 批准号: 443839467
• 金额: --
• 依托单位: Professur für Theoretische Chemie
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/443839467?language=en
• 关键词: Effects; Mechanical; Strain; Structure; Properties

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.

Brumme的项目将使用基于dft的方法研究应变场影响下2dm和异质结构的电子、光学和输运性质。他将重点研究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破坏某些对称性，例如双层2H-WSe2中的反转对称性。这将使不同的传输通道之间的切换和/或允许谷自由度的调整。此外，应变依赖的振动特性和拓扑相变将在本项目中解决。