Terahertz nonlinear transport in twisted graphene and van der Waals heterostructures

扭曲石墨烯和范德华异质结构中的太赫兹非线性传输

• 批准号: 443274073
• 负责人: Professor Dr. Sergey Ganichev
• 金额: --
• 依托单位: Institut für Experimentelle und Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/443274073?language=en
• 关键词: Terahertz; nonlinear; transport; twisted; graphene

Our long-term aim is to explore the high frequency electron transport induced by terahertz/infrared radiation in twisted graphene and van der Waals heterostructures, which should uncover novel physical phenomena and open up opportunities to study the charge and spin transport in these materials. Our investigations focus on the following major objectives: dynamic Hall effect and photogalvanic effects driven by polarized THz radiation in twisted graphene layers as well as spin-galvanic effect and generation of spin currents in graphene / 2D magnet structures. In addition, we plan to study similar phenomena in TMDC-based van der Waals heterostructures. As a result, we should get insight into the underlying microscopic mechanisms of THz field induced phenomena, develop corresponding microscopic and phenomenological theories, obtain basic information on spin and charge responses in these materials. By this we provide feedback for the technological groups, and suggest methods for manipulating the spin properties of graphene (TMDC) / 2D magnet structures. Our investigations should provide a scientific basis for novel terahertz/microwave devices.

我们的长期目标是探索太赫兹/红外辐射在扭曲石墨烯和货车德瓦尔斯异质结构中诱导的高频电子输运，这将揭示新的物理现象，并为研究这些材料中的电荷和自旋输运开辟机会。我们的研究主要集中在以下几个方面：在扭曲的石墨烯层中极化太赫兹辐射驱动的动态霍尔效应和光电流效应，以及石墨烯/ 2D磁体结构中的自旋-电效应和自旋电流的产生。此外，我们计划在基于TMDC的货车范德华异质结中研究类似的现象。因此，我们需要深入研究THz场诱导现象的微观机制，发展相应的微观和唯象理论，获得这些材料中自旋和电荷响应的基本信息。通过这一点，我们提供了反馈的技术组，并提出了操纵石墨烯（TMDC）/ 2D磁体结构的自旋特性的方法。我们的研究将为新型太赫兹/微波器件提供科学依据。