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

项目B 07（Kim/Bonn）研究选择性晶格变形以控制相变和集体电子性质。通过使用太赫兹光谱范围内的共振光脉冲激发光学活性声子来实现选择性。对于表现出强电子-声子耦合的两个模型系统，混合有机-无机钙钛矿和基于分子的电荷转移盐，我们的目标是通过操纵单个声子模式来诱导结构相变，并了解铁电有序如何耦合到声子。

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.