Electronic structure of hydrogen-terminated silicon surfaces [H-Si(111)] studied by two-photon photoemission

Tsuneyuki Nakamura, Ken Miyajima, Naoyuki Hirata, Takeshi Matsumoto, Yoshitada Morikawa, Hirokazu Tada, Atsushi Nakajima

Research output: Contribution to journalArticle

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Abstract

The surface and bulk electronic states of hydrogen-terminated Si(111)-(1 × 1) [H-Si(111)] were studied by two-photon photoemission (2PPE) spectroscopy. With the polarization and emission-angle dependence of the 2PPE spectra, five series of electronic structures for H-Si(111) can be identified as A, B, C, D, and E in the 2PPE spectra by fine tuning the exciting photon energy, hv, from 4.23 to 4.90 eV. For hv < 4.6 eV, peak A arises from a surface resonance at a 1.01 eV from EF, and at the photon energy higher than 4.6 eV, peak A indicates photoemission from an intermediate state, corresponding to an image-potential state at 3.61 eV from EF. Other structures, B, C, and D arise from bulk states, while structure E occurs from an electronhole excitation process. This work has revealed the surface resonance and the image-potential state on H-Si(111) for the first time.

Original languageEnglish
Pages (from-to)735-743
Number of pages9
JournalApplied Physics A: Materials Science and Processing
Volume98
Issue number4
DOIs
Publication statusPublished - 2010 Mar

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Photoemission
Silicon
Electronic structure
Hydrogen
Photons
Electronic states
Photoelectron spectroscopy
Tuning
Polarization

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)

Cite this

Electronic structure of hydrogen-terminated silicon surfaces [H-Si(111)] studied by two-photon photoemission. / Nakamura, Tsuneyuki; Miyajima, Ken; Hirata, Naoyuki; Matsumoto, Takeshi; Morikawa, Yoshitada; Tada, Hirokazu; Nakajima, Atsushi.

In: Applied Physics A: Materials Science and Processing, Vol. 98, No. 4, 03.2010, p. 735-743.

Research output: Contribution to journalArticle

Nakamura, Tsuneyuki ; Miyajima, Ken ; Hirata, Naoyuki ; Matsumoto, Takeshi ; Morikawa, Yoshitada ; Tada, Hirokazu ; Nakajima, Atsushi. / Electronic structure of hydrogen-terminated silicon surfaces [H-Si(111)] studied by two-photon photoemission. In: Applied Physics A: Materials Science and Processing. 2010 ; Vol. 98, No. 4. pp. 735-743.
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AU - Nakajima, Atsushi

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