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】

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