Terahertz / Infrared and DC nonlinear transport in two-dimensional tellurene

• Applicant: Dr. Mariya Moldavskaya, Ph.D.
• Subject Area: Experimental Condensed Matter Physics
• Term: since 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 564981228

The project aims to explore the nonlinear high-frequency and dc electron transport phenomena in a recently synthesized chiral material, two-dimensional tellurene crystals. These investigations should to uncover novel physical phenomena and open up opportunities to study the charge and spin transport in these systems. An important goal of the project is to get insight into the origin of second and third order transport effects, which include nonlinear Hall, photogalvanic, magneto-photogalvanic, spin-galvanic, and photoconductivity effects. In this proposal it is planned to perform combined studies of THz and DC nonlinear transport. For this purpose, the existing THz equipment will be used together with a wide range of methods and experimental facilities for DC transport and magnetotransport. Special attention will be paid to resonant photocurrents caused by inter-subband, cyclotron and spin resonances. Measurements will be performed with both low and high intensity laser radiation, allowing us to study low and highly nonlinear regimes of terahertz/infrared driven electron transport in tellurene. The planned experiments will provide a new and powerful method to access and characterize the electronic and spin properties of this novel material. Furthermore, our investigations should provide a scientific basis for optoelectronic devices for THz radiation.

• DFG Programme: Research Grants