Geometric Effect in High-Magnetic-Field Transport in Graphene

• Project/Area Number: 21340094
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: OSADA Toshihito 東京大学, 物性研究所, 准教授 (00192526)
• Co-Investigator(Kenkyū-buntansha): KONOIKE Takako 東京大学, 物性研究所, 助教 (70447316) ; UCHIDA Kazuhito 東京大学, 物性研究所, 技術専門職員 (20422438)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000); Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2010: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2009: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
• Keywords: 分子性固体・有機導体 / メゾスコピック系・局在 / グラフェン / 量子ホール効果 / ディラック電子 / メゾスコピック系 / ベリー位相 / 電界効果トランジスタ / 端状態 / pn接合 / 2層グラフェン

Research Abstract

This study aimed to search for novel geometric effects in magnetotransport of graphene. We have mainly studied the quantum Hall edge transport along the graphene junctions. We have experimentally investigated the p/n/p junctions of bilayer graphene and the monolayer-bilayer hetero-junctions of graphene. We have clarified that the full-mixing of parallel edge states and the perfect cancelling of counter-moving edge states occur along the p/n junction of bilayer graphene and the monolayer-bilayer graphene hetero-junction, respectively.

Research Products

• [Journal Article] Magnetotransport in organic Dirac fermion system at the quantum limit: Interlayer Hall effect and surface transport via helical edge states (2012)
  • Author(s): Toshihito Osada
  • Journal Title: Phys. Status Solidi B249 Volume: No.5 Pages: 962-966
  • Peer Reviewed
• [Journal Article] Anomalous Interlayer Hall Effect in Multilayer Massless Dirac Fermion System at the Quantum Limit (2011)
  • Author(s): Toshihito Osada
  • Journal Title: J. Phys. Soc. Jpn. Volume: 80, No.3 Issue: 3 Pages: 033708-033708
  • DOI: 10.1143/jpsj.80.033708
  • NAID: 40018753704
  • Peer Reviewed
• [Journal Article] Magnetotransport of Massless Dirac Fermions in Multilayer Organic Conductors (2011)
  • Author(s): T. Osada, K. Uchida, and T. Konoike
  • Journal Title: J. Phys.: Conf. Ser Volume: 334 Pages: 012049-012049
  • DOI: 10.1088/1742-6596/334/1/012049
  • Peer Reviewed
• [Journal Article] Quantum Hall Transport across Monolayer-Bilayer Boundary in Graphene (2011)
  • Author(s): A. Tsukuda, H. Okunaga, D. Nakahara, K. Uchida, T. Konoike, and T. Osada
  • Journal Title: J. Phys.: Conf. Ser Volume: 334 Pages: 012038-012038
  • DOI: 10.1088/1742-6596/334/1/012038
  • Peer Reviewed
• [Journal Article] Anomalous Interlayer Hall Effect in Multilayer Massless Dirac Fermion System at the Quantum Limit (2011)
  • Author(s): Toshihito Osada
  • Journal Title: Journal of Physical Society of Japan Volume: 80
  • NAID: 40018753704
  • Peer Reviewed
• [Journal Article] First observation of angle-dependent Stark cyclotron resonance in bulk crystals: High-electric-field interlayer magnetotransport in a layered organic conductor (2010)
  • Author(s): A. Kumagai, T. Konoike, K. Uchida, and T. Osada
  • Journal Title: Physica B Volume: 405 Issue: 11 Pages: S202-S204
  • DOI: 10.1016/j.physb.2009.11.095
  • Peer Reviewed
• [Journal Article] Angle-dependent magnetoresistance oscillations and magnetic breakdown inα-(BEDT-TTF)2KHg(SCN)4 (2010)
  • Author(s): K. Uchida, T.Konoike, and T. Osada
  • Journal Title: Physica B Volume: 405 Issue: 11 Pages: S221-S223
  • DOI: 10.1016/j.physb.2010.02.031
  • Peer Reviewed
• [Journal Article] グラファイトの磁気輸送とディラック電子 (2010)
  • Author(s): 長田俊人・今村大樹・内田和人・鴻池貴子
  • Journal Title: 固体物理 Volume: 45, No.11 Pages: 599-610
• [Journal Article] グラファイトの磁気輸送とディラック電子 (2010)
  • Author(s): 長田俊人、今村大樹、内田和人、鴻池貴子
  • Journal Title: 固体物理 Volume: 45 Pages: 599-610
• [Presentation] Surface Magnetotransport due to Helical Edge State in the Organic Dirac Fermion system at the Quantum Limit (2012)
  • Author(s): T. Osada, M. Sato, K. Uchida, and T. Konoike
  • Organizer: International Symposium on Materials Science Opened by Molecular Degrees of Freedom (MDF2012)
  • Place of Presentation: 宮崎
• [Presentation] Surface transport due to helical edge state in the organic Dirac fermion system under high magnetic fields (2012)
  • Author(s): T. Osada, M. Sato, K. Uchida, and T. Konoike
  • Organizer: The 20th International Conference on High Magnetic Fields in Semiconductor Physics (HMF-20)
  • Place of Presentation: Chamonix (France).
• [Presentation] 「グラフェン単層 2 層接合における量子ホール伝導と界面状態」(25aSB-5) (2012)
  • Author(s): 上原史也, 内田和人,鴻池貴子,長田俊人
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学(兵庫)
• [Presentation] 「強磁場下多層ディラック電子系におけるヘリカル表面状態の層間伝導特性」(25aBK-8) (2012)
  • Author(s): 長田俊人
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学(兵庫)
• [Presentation] Magnetotransport in Organic Dirac Fermion System at the Quantum Limit: Interlayer Hall Effect and Surface Transport via Helical Edge State (2011)
  • Author(s): T. Osada
  • Organizer: The 9th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM2011)
  • Place of Presentation: Gniezno (Poland).
• [Presentation] 「グラフェン単層 2 層接合における量子ホール界面状態」(21pTE-5) (2011)
  • Author(s): 上原史也,佃明, 内田和人,鴻池貴子,長田俊人
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山)
• [Presentation] 「スプリットゲートを持つ二層グラフェン の量子伝導」(21pTE-14) (2011)
  • Author(s): 内田和人,鴻池貴子,長田俊人
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山)
• [Presentation] 「低温強磁場における有機多層ディラック 電子系のヘリカル表面状態 II」(21pTR-8) (2011)
  • Author(s): 長田俊人,佐藤光幸,鴻池貴子
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山)
• [Presentation] 「グラフェン接合系における量子ホール端 伝導」(23pTE-7:シンポジウム講演) (2011)
  • Author(s): 長田俊人
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山)
• [Presentation] Quantum Hall Transport in Monolayer-Bilayer Graphene Heterojunction (2011)
  • Author(s): T. Osada, A. Tsukuda, H. Okunaga, and K. Uchida
  • Organizer: The 19th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS19)
  • Place of Presentation: Tallahassee (USA).
• [Presentation] Interlayer Magnetotransport of Massless Dirac Fermions in Zerogap Organic Conductors (2011)
  • Author(s): T. Osada
  • Organizer: The 19th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS19)
  • Place of Presentation: Tallahassee (USA).
• [Presentation] Quantum Hall Transport in Monolayer-Bilayer Graphene Heterojunction (2011)
  • Author(s): T. Osada
  • Organizer: The 19th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS-19)
  • Place of Presentation: Tallahassee, USA
• [Presentation] Quantum Hall Transport in Monolayer-Bilayer Graphene Heterojunction (2011)
  • Author(s): T. Osada
  • Organizer: The 5th International Conference on the Fundamental Science of Graphene and Applications of Graphene-Based Devices (Graphene Week 2011)
  • Place of Presentation: Obergurgl, Austria
• [Presentation] Quantum Hall Transport and Energy Gap in Partially Gated Bilayer Graphene (2011)
  • Author(s): K. Uchida
  • Organizer: The 5th International Conference on the Fundamental Science of Graphene and Applications of Graphene-Based Devices (Graphene Week 2011)
  • Place of Presentation: Obergurgl, Austria
• [Presentation] Quantum Hall Transport across Monolayer-Bilayer Boundary in Graphene (2010)
  • Author(s): A.Tsukuda, H.Okunaga, D.Nakahara, K.Uchida, T.Konoike, T.Osada
  • Organizer: 半導体における強磁場の応用に関する国際会議(HMF-19)
  • Place of Presentation: 福岡国際会議場(福岡県)
  • Year and Date: 2010-08-05
• [Presentation] 「単層/2層グラフェン接合系の磁場中電気 伝導II」(24pRA-2) (2010)
  • Author(s): 佃明,奥永洋夢,長田俊人,内田和人,鴻池貴子
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(大阪).
• [Presentation] 「2層グラフェン n-p-n 接合系における量 子ホール伝導」(24pRA-3) (2010)
  • Author(s): 奥永洋夢,長田俊人,佃明,内田和人,鴻池貴子
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(大阪).
• [Presentation] 「多層グラフェン FET における層間スクリーニング長の磁場依存性」(23pRA-6) (2010)
  • Author(s): 内田和人,長田俊人,鴻池貴子
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(大阪)
• [Presentation] Magnetotransport in organic Dirac fermion systems (2010)
  • Author(s): T. Osada, K. Uchida, and T. Konoike
  • Organizer: ISSP-MDF Joint International Workshop on Spin-Related Phenomena in Organic Materials
  • Place of Presentation: 柏(千葉)
• [Presentation] 「単層/2層グラフェン接合系の磁場中電気 伝導」(23aGS-6) (2010)
  • Author(s): 佃明,長田俊人,中原大介, 内田和人,鴻池貴子
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山)
• [Presentation] 「トップゲートを用いたグラフェン FET 素 子の磁気輸送特性」(23aGS-5) (2010)
  • Author(s): 中原大介,長田俊人,内田和人,鴻池貴子
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山)
• [Presentation] 「多層グラフェン FET における層間スクリーニング長の磁場依存性」(20aGS-11) (2010)
  • Author(s): 内田和人,長田俊人,今村大樹,鴻池貴子
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山)
• [Presentation] 多層 Dirac 粒子系の強磁場 Hall 効果」 (21aGT-11) (2010)
  • Author(s): 長田俊人
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学(岡山)
• [Presentation] Dirac Fermion and Magnetotransport in Multilayer Graphite (2009)
  • Author(s): T.Osada
  • Organizer: International Symposium on Multifunctional Organic Materials and Devices
  • Place of Presentation: 東邦大学
  • Year and Date: 2009-12-12
• [Presentation] Dirac Fermion and Magnetotransport in Multilayer Graphite (2009)
  • Author(s): T. Osada, D. Nakahara, S. Sugawara, H. Imamura, K. Uchida, and T. Konoike
  • Organizer: International Symposium on Multifunctional Organic Materials and Devices (MOMD)
  • Place of Presentation: 長津田(千葉)
• [Book] 「グラフェンの機能と応用展望II」(斉木 幸一郎監修)第16章「グラフェンの量子ホール伝導」 (2012)
  • Author(s): 長田俊人
  • Publisher: シーエム シー出版
• [Book] グラフェンの機能と応用展望II（第16章グラフェンの量子ホール伝導） (2012)
  • Author(s): 長田俊人
  • Total Pages: 16
  • Publisher: シーエムシー出版
• [Remarks]
  • URL: http://osada.issp.u-tokyo.ac.jp/
• [Remarks] 長田研究室ホームページ
  • URL: http://osada.issp.u-tokyo.ac.jp/
• [Remarks]
  • URL: http://osada.issp.u-tokyo.ac.jp/
• [Remarks]
  • URL: http://osada.issp.u-tokyo.ac.jp/