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Non-linear kinetic model for oscillatory relaxation of the photovoltage effect on a Si(111)7×7 surface.

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    • Abstract:
      Abstract: Oscillatory relaxation of surface photovoltage has been observed by time-resolved photoemission spectroscopy on a Si(111)7×7 surface with a temporal period of several tens of nanoseconds. The oscillation was reproduced by solving non-linear Master equations that describe surface recombination of electron–hole pairs associated with the formation of exciton-like states at the surface. Appearance of non-linear phenomena is naturally expected by the model when high density photo-excited carriers are generated by the high power laser pulse. [Copyright &y& Elsevier]
    • Abstract:
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