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

M. Ogawa, R. Y. Liu, C. H. Lin, S. Yamamoto, R. Yukawa, R. Hobara, S. J. Tang, I. Matsuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)70-75
Number of pages6
JournalSurface Science
Volume624
DOIs
Publication statusPublished - 2014 Jun
Externally publishedYes

Keywords

  • Carrier dynamics
  • Semiconductor surface
  • Surface photovoltage
  • Synchrotron radiation
  • Time-resolved photoemission

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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