Tuning dimensionality in low-dimensional systems by strain (B10*)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422213477

The project will develop a novel methodology to apply strong out-of-plane strain and strain gradients to structurally layered single crystals. This will drive systems closer to a 2D limit, which impacts and usually enhances correlation effects. Fe-based, nickelate and ruthenate unconventional superconductors will be targeted, systems in which low dimensionality is believed to be key to their superconductivity. Such experiments are strongly hindered by the tendency of layered materials to cleave under tension, an experimental obstacle we aim to overcome by developing a novel approach based on microfabricating crystalline pillars with a strong amorphous coating to prevent fractures from propagating. We will probe the response of correlated phases using primarily transport and Raman spectroscopy.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 288: Elastic Tuning and Response of Electronic Quantum Phases of Matter (ELASTO-Q-MAT)
• Applicant Institution: Goethe-Universität Frankfurt am Main
• Project Heads: Professor Dr. Matthieu Le Tacon, since 7/2024; Professor Dr. Philip Moll, since 7/2024