フルカワ カズアキ   FURUKAWA Kazuaki
  古川 一暁
   所属   理工学部 総合理工学科(物理学系)
   職種   教授
言語種別 英語
発行・発表の年月 2018/05
形態種別 学術雑誌
査読 査読あり
標題 Relaxation of Plasma Carriers in Graphene: An Approach by Frequency-Dependent Optical Conductivity Measurement
執筆形態 共著
掲載誌名 Advanced Optical Materials
掲載区分国外
出版社・発行元 Wiley-VCH
巻・号・頁 6,pp.1701402
総ページ数 7
著者・共著者 Wookjin Choi, Hayate Nishiyama, Yui Ogawa, Yuko Ueno, Kazuaki Furukawa, Tomohiro Takeuchi, Yusuke Tsutsui, Tsuneaki Sakurai, and Shu Seki
概要 The relaxation time and mobility of electrons on graphene are deduced quantitatively by complex permittivity analysis with microwave dielectric loss spectroscopy. Hexagonal graphene sheets with uniform domain sizes from 6 to 30 μm are employed to determine the factors for carrier relaxation at the intradomain and grain boundaries. The changes in the complex permittivity by carrier injections clearly show an evidence of plasma carriers in graphene.