Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds: Mott insulator to metal or charge-density-wave state

H. Matsuzaki, M. Iwata, T. Miyamoto, T. Terashige, K. Iwano, S. Takaishi, M. Takamura, S. Kumagai, M. Yamashita, R. Takahashi, Y. Wakabayashi, H. Okamoto

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Abstract

Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave (CDW) state, were achieved in a bromine-bridged Pd-chain compound [Pd(en)2Br](C5-Y)2H2O (en=ethylenediamine and C5-Y=dialkylsulfosuccinate), by selecting the photon energy of a femtosecond excitation pulse. For the resonant excitation of the Mott-gap transition, excitonic states are generated and converted to one-dimensional CDW domains. For the higher-energy excitation, free electron and hole carriers are produced, giving rise to a transition of the Mott insulator to a metal. Such selectivity in photoconversions by the choice of initial photoexcited states opens a new possibility for the developments of advanced optical switching and memory functions.

Original languageEnglish
Article number096403
JournalPhysical review letters
Volume113
Issue number9
DOIs
Publication statusPublished - 2014 Aug 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Matsuzaki, H., Iwata, M., Miyamoto, T., Terashige, T., Iwano, K., Takaishi, S., Takamura, M., Kumagai, S., Yamashita, M., Takahashi, R., Wakabayashi, Y., & Okamoto, H. (2014). Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds: Mott insulator to metal or charge-density-wave state. Physical review letters, 113(9), [096403]. https://doi.org/10.1103/PhysRevLett.113.096403