Interplay of lattice, charge and spin degrees of freedom from first principles (A05)

• Subject Area: Theoretical Condensed Matter Physics
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422213477

The project will explore and model, under various conditions of anisotropic strain, pressure and doping, the role of electron-lattice coupling versus electron-electron interactions in (i) the formation of charge density wave (CDW) instabilities and superconductivity in layered Kagome-based systems, (ii) the formation of multiferroic phases in triangular-lattice organic charge-transfer salts, (iii) the competition of magnetic, structural, nematic and superconducting phases in SrRu2O4 and AT2X2 (A = rare-earth or alkaline-earth metal, T = transition metal, X = P, As) with a special focus on the phenomenon of super-elasticity in some families of the latter. For that we will employ a combination of ab initio-based methods with recently developed many-body techniques.

• 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 Head: Professorin Dr. Maria Roser Valenti