Interaction-driven Emergent Electronic Properties and Charge Ordering in TMDC moiré superlattices (EECO)

• Applicants: Professor Dr. Robert H. Blick; Chithra Harihara Sharma, Ph.D.; Professor Dr. Kai Rossnagel
• Subject Area: Experimental Condensed Matter Physics ; Synthesis and Properties of Functional Materials
• Term: since 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 561504222

This project aims to realize and understand novel electronic correlation phenomena, charge ordering, and emergent quantum phases in moiré superlattices of transition metal dichalcogenides (TMDCs) such as MoS2. The primary scientific objective is to engineer and manipulate the band structures, wavefunctions, and interactions within TMDC monolayers by employing van der Waals stacking techniques. The sequential stacking of bilayer TMDC heterostructures enables us to uncover and characterize modified or emergent correlated electron phases. To achieve this, we will leverage a combination of advanced experimental techniques, including quantum transport measurements and angle-resolved photoemission spectroscopy (ARPES). Transport measurements will provide insights into the electronic properties and phase transitions at low temperatures and high magnetic fields, revealing intricate details of the electron correlation effects. ARPES will be utilized to map out the electronic band structures and identify the nature of the wavefunctions involved in the emergent phenomena. The exploration of these novel electronic states in TMDC materials holds significant promise for advancing our understanding of strongly correlated electron systems. By precisely controlling the stacking and interaction parameters, we aim to pave the way for the development of next-generation electronic devices and quantum technologies. This research will not only contribute to the fundamental knowledge of condensed matter physics but also open up new avenues for engineering quantum materials with tailored electronic properties.

• DFG Programme: Research Grants