| Autor: |
M. Iwata, Yusuke Wakabayashi, Hiroyuki Matsuzaki, Tatsuya Miyamoto, Shohei Kumagai, R. Takahashi, Masahiro Yamashita, Mitsuhito Takamura, Shinya Takaishi, Hiroshi Okamoto, Kaoru Iwano, T. Terashige |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Physical review letters. 113(9) |
| ISSN: |
1079-7114 |
| Popis: |
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 [$\mathrm{Pd}{(\mathrm{en})}_{2}\mathrm{Br}]{({\mathrm{C}}_{5}\text{\ensuremath{-}}\mathrm{Y})}_{2}{\mathrm{H}}_{2}\mathrm{O}$ ($\mathrm{en}=\text{ethylenediamine}$ and ${\mathrm{C}}_{5}\text{\ensuremath{-}}\mathrm{Y}=\text{dialkylsulfosuccinate}$), 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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