Bottom-Up Fabrication of Vertical Nanowire Spin-LEDs on Silicon

• Project/Area Number: 16K13671
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Crystal engineering
• Research Institution: Hokkaido University
• Principal Investigator: Hara Shinjiro 北海道大学, 量子集積エレクトロニクス研究センター, 准教授 (50374616)
• Research Collaborator: KLAR Peter Jens ; ELM Matthias Thomas ; MOTOHISA Junichi ; AKABORI Masashi
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 縦型ナノワイヤ / ヘテロ接合ナノワイヤ / 選択成長 / 縦型スピン発光ダイオード / ボトムアップ形成

Outline of Final Research Achievements

The purpose of this study is to create vertical spin-nanowire-light-emitting diodes (LEDs), in which vertical semiconductor pn-junction nanowires (NWs) are used with ferromagnetic nanostructures and magnetic tunnel junction (MTJ) electrodes. Such vertical spin-NW-LEDs are realized using free-standing NWs with a high aspect ratio fabricated by our bottom-up-type formation method in a reproducible manner in terms of a location and size of NWs on substrates. We succeeded in obtaining the experimental results mainly relating to quasi-one-dimensional mesoscopic characterization of electron scattering and magnetotransport phenomena, control of magnetic domains and magnetization directions in ferromagnetic MnAs nanostructures and CoFe/MgO-MTJ electrodes, a quantum dot effect in vertical InAsP/InP heterojunction NWs, and device fabrication processes to form flat MTJ electrodes with single magnetic domains and well-controlled magnetization directions on buried insulating layers and exposed NWs.

Academic Significance and Societal Importance of the Research Achievements

本課題の最終目標である縦型NWスピンLEDの実現には至っていないが、それを達成すべく推進した種々の要素技術に関する成果が多数得られた。当初計画の通り、国内・海外研究協力先との連携を鋭意推進することで、素子設計の具体的な指針を得られたことの社会的意義は大きい。本課題で得られた種々の要素技術を結集して、今後の研究推進により当初目標で設定する素子実用化が近づいたと強く感じる。また実用化に傾倒した結果のみならず、NW中の電子散乱過程に関して、より普遍性の高いモデル化に向け、擬一次元メゾスコピック系物性物理に関する基礎的な理解が深まった学術的意義は極めて大きい。

Research Products

• [Int'l Joint Research] Justus-Liebig-University Giessen(ドイツ)
• [Int'l Joint Research] Justus-Liebig-University of Giessen(ドイツ)
• [Int'l Joint Research] Justus-Liebig-University of Giessen(ドイツ)
• [Journal Article] Selective-area growth of magnetic MnAs nanodisks on Si (111) substrates using multiple types of dielectric masks (2019)
  • Author(s): Ryoma Horiguchi, Shinjiro Hara, Masaya Iida, Kohei Morita
  • Journal Title: Journal of Crystal Growth Volume: 507 Pages: 226-231
  • DOI: 10.1016/j.jcrysgro.2018.11.015
  • Peer Reviewed
• [Journal Article] Magnetization characterization of MnAs nanoclusters at close range in bended MnAs/InAs heterojunction nanowires (2019)
  • Author(s): Ryutaro Kodaira, Ryoma Horiguchi, Shinjiro Hara
  • Journal Title: Journal of Crystal Growth Volume: 507 Pages: 241-245
  • DOI: 10.1016/j.jcrysgro.2018.11.023
  • Peer Reviewed
• [Journal Article] Magnetic domain structure and domain wall analysis of ferromagnetic MnAs nanodisks selectively-grown on Si (111) substrates for spintronic applications (2018)
  • Author(s): Ryoma Horiguchi, Shinjiro Hara, Masaya Iida
  • Journal Title: Journal of Applied Physics Volume: 124 Issue: 15
  • DOI: 10.1063/1.5045241
  • NAID: 120006732895
  • Peer Reviewed
• [Journal Article] Shape control of ferromagnetic MnAs nanoclusters exhibiting magnetization switching in vertical MnAs/InAs heterojunction nanowires (2017)
  • Author(s): Ryutaro Kodaira、Kyohei Kabamoto、Shinjiro Hara
  • Journal Title: Japanese Journal of Applied Physics Volume: 56 Issue: 6S1 Pages: 06GH03-06GH03
  • DOI: 10.7567/jjap.56.06gh03
  • NAID: 210000147903
  • Peer Reviewed
• [Journal Article] Analyses of magnetization switching and magnetic domains in lateral MnAs nanowires in combination with structural characterization (2017)
  • Author(s): Ryoma Horiguchi、Hiroaki Kato、Kyohei Kabamoto、Ryutaro Kodaira、Shinjiro Hara
  • Journal Title: Japanese Journal of Applied Physics Volume: 56 Issue: 6S1 Pages: 06GH05-06GH05
  • DOI: 10.7567/jjap.56.06gh05
  • NAID: 210000147905
  • Peer Reviewed
• [Journal Article] Single-Photon Emission from InAsP Quantum Dots Embedded in Density-Controlled InP Nanowires (2017)
  • Author(s): Shougo Yanase, Hirotake Sasakura, Shinjiro Hara, and Junichi Motohisa
  • Journal Title: Japanese Journal of Applied Physics Volume: 56 Issue: 4S Pages: 04CP04-04CP04
  • DOI: 10.7567/jjap.56.04cp04
  • NAID: 210000147666
  • Peer Reviewed
• [Journal Article] Magnetization in Vertical MnAs/InAs Heterojunction Nanowires (2017)
  • Author(s): Kyohei Kabamoto, Ryutaro Kodaira, and Shinjiro Hara
  • Journal Title: Journal of Crystal Growth Volume: 464 Pages: 80-85
  • DOI: 10.1016/j.jcrysgro.2016.11.044
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis and Structural Characterization of Vertical Ferromagnetic MnAs/Semiconducting InAs Heterojunction Nanowires (2016)
  • Author(s): Ryutaro Kodaira, Shinjiro Hara, Kyohei Kabamoto, and Hiromu Fujimagari
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Issue: 7 Pages: 075503-075503
  • DOI: 10.7567/jjap.55.075503
  • NAID: 210000146762
  • Peer Reviewed / Open Access
• [Presentation] Analyses of Magnetic Domains in MnAs Nanoclusters Grown by Selective-Area MOVPE (2018)
  • Author(s): Ryoma Horiguchi, Masaya Iida, Kohei Morita, Shinjiro Hara
  • Organizer: the 19th International Conference on Metal-Organic Vapor Phase Epitaxy (ICMOVPE-XIX), Nara, Japan, June 3-8, 2018, 5B-3.6
  • Int'l Joint Research
• [Presentation] Magnetization Characterization of Two MnAs Nanoclusters at Close Range in MnAs/InAs Heterojunction Nanowires (2018)
  • Author(s): Ryutaro Kodaira, Ryoma Horiguchi, Shinjiro Hara
  • Organizer: the 19th International Conference on Metal-Organic Vapor Phase Epitaxy (ICMOVPE-XIX), Nara, Japan, June 3-8, 2018, 7C-3.6
  • Int'l Joint Research
• [Presentation] Selective-Area Growth and Transport Characterization of Vertical MnAs/InAs Heterojunction Nanowires (2018)
  • Author(s): Shinjiro Hara, Matthias T. Elm, Peter J. Klar
  • Organizer: the 10th International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2018), Paris, France, July 8-13, 2018, H5-10
  • Int'l Joint Research / Invited
• [Presentation] Determing the Carrier Mobility in Single InAs Nanowires from Magnetotransport Measurements (2018)
  • Author(s): Patrick Uredat, Ryutaro Kodaira, Ryoma Horiguchi, Shinjiro Hara, Peter J. Klar, Matthias T. Elm
  • Organizer: the 2018 International Conference on Solid State Devices and Materials (SSDM 2018), Tokyo, Japan, September 9-13, 2018, M-6-02
  • Int'l Joint Research
• [Presentation] Dependence of Si Nanowire Orientation on Vapor-Liquid-Solid Growth Conditions (2018)
  • Author(s): Yuki Kitazawa, Ryutaro Kodaira, Ryoma Horiguchi, Wipakorn Jevasuwan, Naoki Fukata, Shinjiro Hara
  • Organizer: the 31st International Microprocesses and Nanotechnology Conference (MNC 2018), Sapporo, Japan, November 13-16, 2018, 16P-11-111L
  • Int'l Joint Research
• [Presentation] Structural Investigation of Bended MnAs/InAs Heterojunction Nanowires (2018)
  • Author(s): Tetsuro Kadowaki, Ryutaro Kodaira, Shinjiro Hara
  • Organizer: the 31st International Microprocesses and Nanotechnology Conference (MNC 2018), Sapporo, Japan, November 13-16, 2018, 16P-11-115L
  • Int'l Joint Research
• [Presentation] Magnetic Domain Structures Depending on Applied Magnetic Fields in MnAs Nanodisks Selectively-Grown on Si (111) Substrates (2018)
  • Author(s): Kozaburo Suzuki, Ryoma Horiguchi, Masaya Iida, Shinjiro Hara
  • Organizer: the 31st International Microprocesses and Nanotechnology Conference (MNC 2018), Sapporo, Japan, November 13-16, 2018, 16P-11-116L
  • Int'l Joint Research
• [Presentation] Photoluminescence of Zn-Doped InP Nanowires: Mixing of Crystal Structures, Donor-Acceptor Pair Recombination, and Surface Effects (2017)
  • Author(s): Junichi Motohisa, Hiroki Kameda, Masahiro Sasaki, Shinjiro Hara, Katsuhiro Tomioka
  • Organizer: the 29th International Conference on Defects in Semiconductors (ICDS 2017), Matsue, Japan, July 31-August 4, 2017, TuP-33
  • Int'l Joint Research
• [Presentation] Magnetic Domain Characterizations of MnAs Nanoclusters on Si (111) Substrate (2017)
  • Author(s): Masaya Iida, Ryoma Horiguchi, Kohei Morita, Shinjiro Hara
  • Organizer: the 2017 International Conference on Solid State Devices and Materials (SSDM 2017), Sendai, Japan, September 19-22, 2017, PS-8-02
  • Int'l Joint Research
• [Presentation] Analysis of Bending Mechanism in MnAs/InAs Heterojunction Nanowires (2017)
  • Author(s): Tetsuro Kadowaki, Ryutaro Kodaira, Shinjiro Hara
  • Organizer: the 2017 International Conference on Solid State Devices and Materials (SSDM 2017), Sendai, Japan, September 19-22, 2017, J-6-02
  • Int'l Joint Research
• [Presentation] Electrical Ttransport Properties of Single MnAs/InAs Hybrid Nanowires Grown by Selective-Area Metal-Organic Vapor Phase Epitaxy (2017)
  • Author(s): Patrick Uredat, Matthias T. Elm, Ryutaro Kodaira, Ryoma Horiguchi, Peter J. Klar, Shinjiro Hara
  • Organizer: the 2017 Material Research Society (MRS) Fall Meeting, Boston, Massachusetts, USA, November 26-December 1, 2017, NM03.07.06
  • Int'l Joint Research
• [Presentation] Control of Bending Structures in MnAs/InAs Heterojunction Nanowires (2017)
  • Author(s): Ryutaro Kodaira, Tetsuro Kadowaki, Shinjiro Hara
  • Organizer: the 2017 Material Research Society (MRS) Fall Meeting, Boston, Massachusetts, USA, November 26-December 1, 2017, NM03.14.17
  • Int'l Joint Research
• [Presentation] Size-Dependent Magnetic Domain Structure in MnAs Nanoclusters Selectively Grown on Si (111) Substrates Covered with Different Dielectric Mask Designs (2017)
  • Author(s): Ryoma Horiguchi, Masaya Iida, Kohei Morita, Shinjiro Hara
  • Organizer: the 2017 Material Research Society (MRS) Fall Meeting, Boston, Massachusetts, USA, November 26-December 1, 2017, EM08.06.04
  • Int'l Joint Research
• [Presentation] Structural Characterization and Magnetotransport Properties of MnAs/InAs Hybrid Nanowires Grown by Selective-Area Metal-Organic Vapor Phase Epitaxy (2016)
  • Author(s): Matthias T. Elm
  • Organizer: the 2016 Material Research Society (MRS) Fall Meeting, NM1.2.02
  • Place of Presentation: Hynes Convention Center Boston (USA)
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] Shape Control of Ferromagnetic MnAs Nanoclusters and Their Magnetization in Semiconducting InAs Nanowires (2016)
  • Author(s): Ryutaro Kodaia
  • Organizer: the 29th International Microprocesses and Nanotechnology Conference (MNC 2016), 11B-10-4
  • Place of Presentation: ANAクラウンプラザホテル（京都府京都市）
  • Year and Date: 2016-11-11
  • Int'l Joint Research
• [Presentation] Structural and Magnetic Domain Characterization of Lateral MnAs Nanowires (2016)
  • Author(s): Ryoma Horiguchi
  • Organizer: the 29th International Microprocesses and Nanotechnology Conference (MNC 2016), 11B-10-3
  • Place of Presentation: ANAクラウンプラザホテル（京都府京都市）
  • Year and Date: 2016-11-11
  • Int'l Joint Research
• [Presentation] Single Photon Emission from InAsP Quantum Dots Embedded in Density-Controlled InP Nanowires (2016)
  • Author(s): Junichi Motohisa
  • Organizer: the 2016 International Conference on Solid State Devices and Materials (SSDM 2016), K-5-02
  • Place of Presentation: つくば国際会議場（茨城県つくば市）
  • Year and Date: 2016-09-29
  • Int'l Joint Research
• [Presentation] Magnetic Domain Structures of MnAs/InAs Heterojunction Nanowires (2016)
  • Author(s): Kabamoto Kabamoto
  • Organizer: the 18th International Conference on Metal-Organic Vapor Phase Epitaxy (ICMOVPE-XVIII), 5A-2.4
  • Place of Presentation: Sheraton San Diego Hotel and Marina (USA)
  • Year and Date: 2016-07-15
  • Int'l Joint Research
• [Presentation] Growth Time Dependence of Ferromagnetic MnAs Nanoclusters Formation in Semiconducting InAs Nanowires (2016)
  • Author(s): Ryutaro Kodaia
  • Organizer: the 18th International Conference on Metal-Organic Vapor Phase Epitaxy (ICMOVPE-XVIII), 5A-2.3
  • Place of Presentation: Sheraton San Diego Hotel and Marina (USA)
  • Year and Date: 2016-07-15
  • Int'l Joint Research
• [Presentation] Density Control of InP-based Nanowires and Nanowire Quanutm Dots (2016)
  • Author(s): Junichi Motohisa
  • Organizer: the 35th Electronic Materials Symposium (EMS-35), Th3-2
  • Place of Presentation: ラフォーレ琵琶湖（滋賀県守山市）
  • Year and Date: 2016-07-07
  • Int'l Joint Research
• [Presentation] Vertical Free-Standing Ferromagnetic MnAs/Semiconducting InAs Heterojunction Nanowires (Invited Paper) (2016)
  • Author(s): Shinjiro Hara
  • Organizer: the 9th International Conference on Processing and Manufacturing of Advanced Materials (THERMEC 2016), H1-5
  • Place of Presentation: Messe Graz (Austria)
  • Year and Date: 2016-05-30
  • Int'l Joint Research / Invited
• [Book] Novel Compound Semiconductor Nanowires: Materials, Devices, and Applications, edited by Fumitaro Ishikawa and Irina Buyanova: "Ferromagnetic MnAs/III-V Hybrid Nanowires for Spintronics", Part II, Chapter 6, pp. 177-220 (2017)
  • Author(s): Shinjiro Hara
  • Total Pages: 527
  • Publisher: Pan Stanford Publishing Pte Ltd
  • ISBN: 9789814745765