Cyclotron resonance on CVD synthesized graphene

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540429
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: National Institute for Materials Science
• Principal Investigator: TAKEHANA Kanji 独立行政法人物質・材料研究機構, 表界面構造・物性ユニット, 主幹研究員 (50354361)
• Co-Investigator(Renkei-kenkyūsha): TAKAMASU Tadashi 物質・材料研究機構, 表界面構造・物性ユニット, グループリーダー (60212015) ; IMANAKA Yasutaka 物質・材料研究機構, 表界面構造・物性ユニット, グループリーダー (70354371) ; MITSUI Tadashi 物質・材料研究機構, 表界面構造・物性ユニット, 主任研究員 (90343863)
• Project Period (FY): 2011 – 2013
• Keywords: 分子性固体・有機導体 / グラフェン / サイクロトロン共鳴

Research Abstract

Cyclotron resonance (CR) has been investigated on single-layer large-area graphene which was synthesized by chemical vapor deposition (CVD). As the experimental results, I found significant substrate dependence of the band velocity of the graphene. It could not be explained by the theoretical study using the many-body correction. It might be caused by other condition of the sample such as strains and/or fitness between the graphene and the substrate. I found that the CR peak of the lowest LL transition of 0=>+1(-1=>0) consist of two components and that the ratio of the intensities of these two peaks changes with applied magnetic fields.
In order to improve the present magneto-optical spectrometer in infrared region, I developed new detector unit which is installed just below the sample at the magnet center. I confirmed the detection of the infrared light using the detector unit up to B = 15 T.

Research Products

• [Journal Article] Substrate dependence of cyclotron resonance on large-area CVD grapheme (2014)
  • Author(s): K. Takehana, Y. Imanaka, T. Takamasu, Y. Kim, K. -S. An
  • Journal Title: Current Applied Physics Volume: Vol. 14, No. 1 Pages: 119-122
  • DOI: 10.1016/j.cap.2013.11.010
  • Peer Reviewed
• [Presentation] CVDグラフェンにおけるLog T抵抗増大 (2013)
  • Author(s): 竹端寛治, 今中康貴, 高増正, Y. Kim, K. -S. An
  • Organizer: 東京大学物性研究所短期研究会「極限強磁場科学」
  • Place of Presentation: 東京大学物性研究所, 柏市
  • Year and Date: 20131031-1101
• [Presentation] Cyclotron resonance and magneto-transport measurement on CVD grapheme (2013)
  • Author(s): K. Takehana, Y. Imanaka, T. Takamasu, Y. Kim, K. -S. An
  • Organizer: The 16th International Symposium on the Physics of Semiconductor
  • Place of Presentation: Jeju, 韓国
  • Year and Date: 20130702-05
• [Presentation] (2012)
  • Author(s): 竹端寛治, 今中康貴, 三井正, 高増正, 渡辺英一郎, 大里啓孝, 津谷大樹, Y. Kim, K. -S. An, B. H. Hong
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学, 横浜市
  • Year and Date: 20120918-21