Coupling of electronic transition to ferroelectric order in a 2D semiconductor.

• Tác giả: Dmitri N Basov, Valentina Bisogni, Daniel G Chica, Zhi-Hao Cui, Taketo Handa, Guiying He, Chun-Ying Huang, Yufeng Liu, Connor A Occhialini, Nicholas Olsen, Abhay Pasupathy, Jonathan Pelliciari, David R Reichman, Xavier Roy, Matthew Sfeir, Yinming Shao, Morgan Thinel, Xiaoyang Zhu, Michael E Ziebel
• Ngôn ngữ: eng
• Ký hiệu phân loại: 348.022 *Laws arranged in chronological order
• Thông tin xuất bản: England : Nature communications , 2025
• Bộ sưu tập: NCBI
• ID: 644248

Tóm tắt

A ferroelectric material often exhibits a soft transverse optical (TO) phonon mode which governs its phase transition. Charge coupling to this ferroelectric soft mode may further mediate emergent physical properties, including superconductivity and defect tolerance in semiconductors. However, direct experimental evidence for such coupling is scarce. Here we show that a photogenerated coherent phonon couples strongly to the electronic transition above the bandgap in the van der Waals (vdW) two-dimensional (2D) ferroelectric semiconductor NbOI