Superconducting transport phenomena and the electron structures in semiconductor nanowires
Project/Area Number |
15H05407
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Single-year Grants |
Research Field |
Nanostructural physics
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Research Institution | The University of Tokyo |
Principal Investigator |
Matsuo Sadashige 東京大学, 大学院工学系研究科(工学部), 助教 (90743980)
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Co-Investigator(Renkei-kenkyūsha) |
TARUCHA Seigo 東京大学, 大学院工学系研究科, 教授 (40302799)
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Research Collaborator |
BABA Shoji
TATENO Mizuki
UEDA Kento
SATO Yosuke
TAKESHIGE Yuusuke
KAMATA Hiroshi
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
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Keywords | マヨラナ粒子 / トポロジカル超伝導 / 半導体ナノ細線 / 超伝導 / メゾスコピック物理 / アンドレーエフ反射 / アンドレーエフ束縛状態 / ヘリカル状態 / 量子化伝導度プラトー / メゾスコピック系 |
Outline of Final Research Achievements |
About junctions of superconductors and double InAs nanowires, we established the fabrication technique and demonstrated Cooper pair splitting in the junctions via quantum dots occasionally formed in the nanowires. Furthermore, we demonstrated Cooper pair splitting in the ballistic double nanowire junctions. We also fabricated the nice interface between NbTi and InAs quantum well and realized coexistence of superconductivity and spin-resolved quantum Hall effect. In the junctions, we observed conductance enhancement around zero bias voltage as a signature of equal-spin Andreev reflection. In addition, we found the half-integer quantized conductance plateaus in InAs quantum wire and in-plane fields makes the plateau conductance decrease, meaning the e-e interaction can be assigned as the origin instead of the spin-orbit interaction. We succeeded in gate control of supercurrent in Corbino-geometry Josephson junction and estimation of vortex size from the field dependence.
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Report
(4 results)
Research Products
(75 results)
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[Journal Article] Cooper pair splitting in two parallel InAs nanowires2018
Author(s)
Shoji Baba, Christian Junger, Sadashige Matsuo, Andreas Baumgartner, Yosuke Sato, Hiroshi Kamata, Kan Li, Soren Jeppesen, Lars Samuelson, Hongqi Xu, Christian Schonenberger, Seigo Tarucha
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Journal Title
arXiv
Volume: 1802
Pages: 08059-08059
Related Report
Open Access
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[Presentation] h-BN上InAs量子細線の電気伝導特性2017
Author(s)
鎌田大, R. S. Deacon, 松尾貞茂, 馬場翔二, K. Li, H. Q. Xu, 大岩顕, 樽茶清悟
Organizer
日本物理学会2017年年次大会
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
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[Presentation] Josephson radiation of InAs nanowire Josephson junctions2017
Author(s)
H. Kamata, R. S. Deacon, S. Matsuo, S. Baba , K. Li, H. Q. Xu, K. Ishibashi, S. Tarucha
Organizer
22nd International Conference on Electronic Properties of Two Dimensional Systems (EP2DS-22)/18th International Conference on Modulated Semiconductor Structures (MSS-18)
Related Report
Int'l Joint Research
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[Presentation] 並列二重InAsナノ細線と超伝導体の接合におけるクーパー対分離の観測2017
Author(s)
Y. Sato, S. Baba, C. Juenger, Sadashige Matsuo, A. Baumgatner,Hiroshi Kamata , K. Li, H.Q. Xu, C. Schonenberger, A. Oiwa, S. Tarucha
Organizer
日本物理学会2017年秋季大会
Related Report
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[Presentation] Equal-spin Andreev Reflection between Spin-resolved Quantum Hall Bulk State and Superconductor2016
Author(s)
S. Matsuo, K. Ueda, S. Baba, H. Kamata, M. Tateno, J. Shabani, C. J. Palmstrom, and S. Tarucha
Organizer
International workshop on nano-spin conversion science & quantum spin dynamics (NSCS-QSM)
Place of Presentation
Takeda Hall, The University of Tokyo, Tokyo, Japan
Year and Date
2016-10-12
Related Report
Int'l Joint Research
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[Presentation] Single photon-electron pairs generation from polarization entangled photon pairs2016
Author(s)
K. Kuroyama, M. Larsson, T. Fujita, S. Matsuo, S. R. Valentin, A. Ludwig, A. Wieck, A. Oiwa, S.Tarucha
Organizer
International workshop on nano-spin conversion science & quantum spin dynamics (NSCS-QSM)
Place of Presentation
Takeda Hall, The University of Tokyo, Tokyo, Japan
Year and Date
2016-10-12
Related Report
Int'l Joint Research
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[Presentation] Transport properties of InAs nanowires on hexagonal boronnitride2016
Author(s)
H. Kamata, R. S. Deacon, S. Matsuo, S. Baba, K. Li, H. Q. Xu, A. Oiwa, S. Tarucha
Organizer
International workshop on nano-spin conversion science & quantum spin dynamics (NSCS-QSM)
Place of Presentation
Takeda Hall, The University of Tokyo, Tokyo, Japan
Year and Date
2016-10-12
Related Report
Int'l Joint Research
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[Presentation] Edge mixing dynamics in s quantum Hall pn junction of graphene2016
Author(s)
Sadashige Matsuo, Shunpei Takeshita, Takahiro Tanaka, Shu Nakaharai, Kazuhito Tsukagoshi, Takahiro Moriyama, Teruo Ono, Kensuke Kobayashi
Organizer
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)
Place of Presentation
Kobe International Conference Center, Kobe, Japan
Year and Date
2016-08-08
Related Report
Int'l Joint Research
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[Presentation] Observation of quantum state transfer from single polarized photons to single electron spins using optical Pauli blockade effect2016
Author(s)
M.Larsson, K. Kuroyama, S.Matsuo, T.Fujita, S.R.Valentin, A.Ludwig, A.Wieck, A.Oiwa, S.Tarucha
Organizer
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)
Place of Presentation
Kobe International Conference Center, Kobe, Japan
Year and Date
2016-08-08
Related Report
Int'l Joint Research
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[Presentation] Single-electron charge sensing in InAs self-assembled quantum dots2016
Author(s)
H. Kiyama, T. Hirayama, R. Shikishima, S. Matsuo, S. Baba, N. Nagai, K. Hirakawa, S. Tarucha, A. Oiwa
Organizer
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids (PASPS9)
Place of Presentation
Kobe International Conference Center, Kobe, Japan
Year and Date
2016-08-08
Related Report
Int'l Joint Research
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[Presentation] Generation of single photon-electron pairs from single entangled photon pairs2016
Author(s)
K. Kuroyama, M. Larsson, T. Fujita, S. Matsuo, S. R. Valentin, A. Ludwig, A. Wieck, A. Oiwa, S.Tarucha
Organizer
the 33th International Conference on the Physics of Semiconductors(ICPS2016),
Place of Presentation
Beijing International Convention Center, Beijing China
Year and Date
2016-07-31
Related Report
Int'l Joint Research
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[Presentation] Bias-voltage-dependent 1/f noise in graphene device2015
Author(s)
S. Takeshita, S. Matsuo, T. Tanaka, S. Nakaharai, K. Tsukagoshi, T. Moriyama, T. Ono, K. Kobayashi
Organizer
21st International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS-21)
Place of Presentation
仙台国際センター 宮城県仙台市
Year and Date
2015-07-26
Related Report
Int'l Joint Research
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