Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 69, Issue 5, Pages 1267-1270Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.69.1267
Keywords
critical nucleation; photoinduced phase transition; high-pressure Raman spectroscopy
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We have investigated temporal evolution from the phototransferred metastable state to the ground state, i.e., from the single-valence (SV) to the mixed-valence (MV) states, in the perovskite-type gold complex Cs2Au2Br6. In this system, we can control the relative stability of the states via external pressure P. We have observed a sudden increase of the relative volume v(Mv) of the MV state against time, and have interpreted it in terms of the critical nucleation. The critical time t(c), where v(Mv) becomes 1/2, increases exponentially with P, reflecting the enhanced potential barrier for critical nucleation.
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