In situ observation of formation process of negative electron affinity surface of gaas by surface photo-absorption

Kazuya Hayase, Tomohiro Nishitani, Katsunari Suzuki, Hironobu Imai, Jun Ichi Hasegawa, Daiki Namba, Takashi Meguro

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9 Citations (Scopus)

Abstract

We have used surface photo-absorption (SPA) to investigate the formation of negative electron affinity (NEA) surfaces on p-GaAs during the Yo- Yo method, under an alternating supply of Cs and O2. The SPA spectra showed that the surface during the first Cs step was different from those in the following Cs and O2 steps. This suggests that the surface structure did not change after the initial surface was formed, indicating that there could be two Cs adsorption sites on the GaAs surface, which is different from previously proposed models.

Original languageEnglish
Article number06GG05
JournalJapanese Journal of Applied Physics
Volume52
Issue number6 PART 2
DOIs
Publication statusPublished - 1 Jun 2013

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