Affiliation:
1. NTT Telecommunications Energy Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan
Abstract
Nucleation of nanocrystalline Si (nc-Si) in SiO 2 films irradiated with vacuum ultraviolet and soft x-ray radiation has been investigated by using in-situ spectroscopic ellipsometry, cross-sectional transmission electron microscopy, reflectivity measurement, and reflection high-energy electron diffraction. The formation of nc-Si proceeds in the repetition of two steps: (i) conversion of SiO 2 to SiO x through the creation of Frenkel pairs and the subsequent desorption of O 2, and (ii) separation of SiO x into Si and SiO 2 domains. The average diameter of nc-Si increases from 2 to 10 nm as the irradiation temperature increases from 470°C to 610°C. Above 700°C, oxide domains are gone and solid-phase recrystallization produces Si islands terminated by the Si(100) substrate interface. At temperatures higher than 800°C, these islands collapse and an atomically flat Si(100) interface appears.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献