Choe, Jae-Myung; Chung, Kyoung-Jae; Hwang, Hui-Dong; Hwang, Yong-Seok; Ko, Kwang-Cheol; Kim, Gon-Ho
ArticleIssue Date2006CitationJAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, v.45, no.24-28, pp.L686 - L689PublisherJAPAN SOC APPLIED PHYSICS