Long-lived photoinduced response observed under extreme photoexcitation densities in a one-dimensional Peierls insulator

• Main Authors: Shin, Taeho (Author), Katayama, Ikufumi (Author), Kawano, Taro (Author), Takeda, Jun (Author), Wolfson, Johanna W. (Contributor), Teitelbaum, Samuel Welch (Contributor), Nelson, Keith Adam (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Chemistry (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2018-08-28T20:37:26Z.
• Subjects: Article
• Online Access: Get fulltext

One-dimensional metal-halide compounds provide model systems to investigate the manner in which coupling between elementary degrees of freedom-here, electronic and vibrational-result in instabilities that give rise to both chemical and structural rearrangements. Here, we employ "single-shot" pump-probe spectroscopy to examine a one-dimensional platinum iodide compound (PtI(en)) under far-from-equilibrium conditions where repeated photoexcitation results in sample damage. It presents evidence for a distinct collective excited state lasting more than 100 ps upon self-trapped exciton generation at high densities, as measured by electronic signal amplitudes and phonon properties.
National Science Foundation (U.S.) (Grant CHE-1111557)
United States. Office of Naval Research (Grant N00014-12-1-0530)