Spin-related physics and two-dimensional superconductivity at the cleaved surface of semiconductors without space inversion symmetry

• Project/Area Number: 25400316
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: The University of Tokyo
• Principal Investigator: Masutomi Ryuichi 東京大学, 大学院理学系研究科(理学部), 助教 (00397027)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 2次元電子系 / 単原子層超伝導 / 半導体表面 / 表面2次元電子系 / 低次元超伝導 / ２次元電子系

Outline of Final Research Achievements

We have developed the scanning tunneling microscope combined with transport measurements, which can be operate at low temperature and high magnetic fields. Moreover, using this microscope, the quantum Hall state in adsorbate-induced two dimensional (2D) systems and novel 2D superconductivity in one-atomic-layer metal films are investigated.

Research Products

• [Journal Article] 単原子層超伝導と空間反転対称性の破れ (2017)
  • Author(s): 岡本徹、枡富龍一
  • Journal Title: 固体物理 Volume: 52 Pages: 97-103
  • NAID: 40021104798
  • Peer Reviewed
• [Journal Article] 走査トンネル顕微鏡と電気抵抗測定で探る量子ホール効果 (2017)
  • Author(s): 枡富龍一、岡本徹
  • Journal Title: 東京大学低温センター 年報 Volume: 平成27年度 Pages: 6-12
  • NAID: 40021021436
• [Journal Article] Adsorbate-induced quantum Hall system probed by scanning tunneling spectroscopy combined with transport measurements (2015)
  • Author(s): Ryuichi Masutomi and Tohru Okamoto
  • Journal Title: Appl. Phys. Lett. Volume: 106 Issue: 25 Pages: 251602-251602
  • DOI: 10.1063/1.4922990
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effect of Parallel Magnetic Field on Superconductivity of Ultrathin Metal Films Grown on a Cleaved GaAs Surface (2015)
  • Author(s): Takayuki Sekihara, Takahiro Miyake, Ryuichi Masutomi, Tohru Okamoto
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 6 Pages: 064710-064710
  • DOI: 10.7566/jpsj.84.064710
  • NAID: 40020491305
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electronic Transport at Cleaved Surfaces (2015)
  • Author(s): 岡本徹、枡富龍一
  • Journal Title: Hyomen Kagaku Volume: 36 Issue: 3 Pages: 118-123
  • DOI: 10.1380/jsssj.36.118
  • NAID: 130005129560
  • ISSN: 0388-5321, 1881-4743
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Simultaneous study by scanning tunneling spectroscopy and transport measurements in adsorbate-induced two-dimensional systems (2014)
  • Author(s): Ryuichi Masutomi, Tohru Okamoto
  • Journal Title: Journal of Physics: Conference Series Volume: 568 Issue: 5 Pages: 052020-052020
  • DOI: 10.1088/1742-6596/568/5/052020
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Two-dimensional superconductivity with broken inversion symmetry in one-atomic-layer metal films on cleaved GaAs surface (2014)
  • Author(s): T. Sekihara, T. Miyake, H. Ichinomiya, R. Masutomi, T. Okamoto
  • Journal Title: JPS Conference Proceedings Volume: 3 Pages: 015023-015023
  • DOI: 10.7566/jpscp.3.015023
  • Peer Reviewed
• [Journal Article] Two-Dimensional Superconducting State of Monolayer Pb Films Grown on GaAs(110) in a Strong Parallel Magnetic Field (2013)
  • Author(s): T. Sekihara, R. Masutomi, and T. Okamoto
  • Journal Title: Physical Review Letters Volume: 111 Issue: 5 Pages: 5700-5700
  • DOI: 10.1103/physrevlett.111.057005
  • Peer Reviewed
• [Journal Article] Temperature, electron density and in-plane magnetic field dependence of cyclotron relaxation time in the two-dimensional metallic phase (2013)
  • Author(s): R. Masutomi, T. Chiba, K. Sasaki, I. Yasuda, A. Sekine, K. Sawano, Y. Shiraki, T. Okamoto
  • Journal Title: Journal of Physics: Conference Series Volume: 456 Pages: 12027-12027
  • DOI: 10.1088/1742-6596/456/1/012027
  • Peer Reviewed
• [Journal Article] Magnetic-field-independent superconductivity of ultrathin Pb films on cleaved GaAs surface (2013)
  • Author(s): T. Sekihara, R. Masutomi, and T. Okamoto
  • Journal Title: Journal of Physics: Conference Series Volume: 456 Pages: 12034-12034
  • DOI: 10.1088/1742-6596/456/1/012034
  • Peer Reviewed
• [Journal Article] Low-Temperature Scanning Tunneling Microscopy and Transport Measurements on Adsorbate-Induced Two-Dimensional Electron Systems (2013)
  • Author(s): R. Masutomi, N. Toriyama, T. Okamoto
  • Journal Title: AIP Conference Proceedings Volume: 1566 Pages: 291-291
  • DOI: 10.1063/1.4848400
  • Peer Reviewed
• [Presentation] Pb超薄膜超伝導に対する磁性不純物の影響と平行磁場印加による超伝導転移温度の上昇 (2017)
  • Author(s): 庭田正人、枡富龍一、岡本徹
  • Organizer: 日本物理学会年次大会
  • Place of Presentation: 大阪大学（大阪府、豊中市）
  • Year and Date: 2017-03-17
• [Presentation] Adsorbate-induced quantum Hall system probed by scanning tunneling spectroscopy combined with transport measurements (2016)
  • Author(s): R. Masutomi
  • Organizer: EMN Spring Meeting
  • Place of Presentation: TAIPEI SUNWORLD DYNASTY Hotel（台湾、台北）
  • Year and Date: 2016-03-08
  • Int'l Joint Research / Invited
• [Presentation] Adsorbate-induced quantum Hall system probed by scanning tunneling spectroscopy combined with transport measurements (2016)
  • Author(s): 枡富龍一 、岡本徹
  • Organizer: 第7回低温センター研究交流会
  • Place of Presentation: 東京大学小柴ホール（東京都、文京区）
  • Year and Date: 2016-02-23
• [Presentation] Adsorbate-induced quantum Hall system probed by scanning tunneling spectroscopy combined with transport measurements (2015)
  • Author(s): R. Masutomi and T. Okamoto
  • Organizer: 21st International Conference on Electronic Properties of Two-Dimensional Systems
  • Place of Presentation: 仙台国際センター（宮城県、仙台市）
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] 吸着原子が誘起する２次元電子系における走査トンネル分光顕微鏡と電子輸送特性の同時測定Ⅱ (2014)
  • Author(s): 枡富龍一, 岡本徹
  • Organizer: 日本物理学会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Adsorbate-induced quantum Hall system and superconductivity in one-atomic-layer with Rashba spin-orbit coupling (2014)
  • Author(s): R. Masutomi, T. Okamoto
  • Organizer: 27th International Conference on Low Temperature Physics
  • Place of Presentation: Buenos Aires, Argentina
  • Year and Date: 2014-08-06 – 2014-08-13
• [Presentation] In situ STM/STS and transport studies in adsorbate-induced two-dimensional electron systems (2014)
  • Author(s): R. Masutomi
  • Organizer: Collaborative Conference on Materials Research (2014)
  • Place of Presentation: Incheon/Seoul, South Korea
  • Year and Date: 2014-06-23 – 2014-06-27
  • Invited
• [Presentation] 吸着原子が誘起する2次元電子系における走査トンネル分光顕微鏡と電子輸送特性の同時測定 (2013)
  • Author(s): 枡富龍一，一ノ宮弘樹，岡本徹
  • Organizer: 日本物理学会
  • Place of Presentation: 徳島大学
• [Presentation] STM/STS and transport measurements in adsorbate-induced two-dimensional electron systems (2013)
  • Author(s): Ryuichi Masutomi, Tohru Okamoto
  • Organizer: International Symposium on Advanced Nanodevices and Nanotechnology (ISANN 2013)
  • Place of Presentation: Hawaii, USA