Phonon-driven control of electronic properties in hybrid perovskites and organic charge-transfer salts (B07+)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2020 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422213477

The project B07 (Kim/Bonn) studies selective lattice deformations to control phase transitions and collective electronic properties. Selectivity is achieved by exciting optically active phonons using resonant light pulses in the terahertz spectral range. For two model systems exhibiting strong electron-phonon coupling, hybrid organic-inorganic perovskites and molecule-based charge-transfer salts, we aim to induce structural phase transition by manipulating a single phonon mode and to understand how the ferroelectric order is coupled to phonons.

• 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. Mischa Bonn; Dr. Heejae Kim