Terahertz nonlinear transport in twisted graphene and van der Waals heterostructures

• Applicant: Professor Dr. Sergey Ganichev
• Subject Area: Experimental Condensed Matter Physics
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 443274073

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.

• DFG Programme: Priority Programmes
• Subproject of: SPP 2244: 2D Materials – Physics of van der Waals [hetero]structures (2DMP)