Long-lived photoinduced response observed under extreme photoexcitation densities in a one-dimensional Peierls insulator | |
Article | |
关键词: SELF-TRAPPED EXCITONS; TRANSITION-METAL-COMPLEXES; RESONANCE-RAMAN-SPECTRA; LINEAR-CHAIN COMPLEXES; MIXED-VALENCE; PHASE-TRANSITIONS; 2-BAND MODEL; MX CHAIN; DYNAMICS; TIME; | |
DOI : 10.1103/PhysRevB.98.054111 | |
来源: SCIE |
【 摘 要 】
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.
【 授权许可】
Free