Hybrid Superconductor - Ge/Si core/shell nanowire devices
Project/Area Number |
26790008
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Nanostructural physics
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Research Institution | Institute of Physical and Chemical Research |
Principal Investigator |
Deacon Russell 国立研究開発法人理化学研究所, 石橋極微デバイス工学研究室, 研究員 (40552443)
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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Keywords | 超伝導 / 超電導 / Nanowire / Majorana Fermion / Spin-orbit interaction / Josephson Junctions / Topological Insulator / Josephson Junction / Superconductor / Spin Orbit Interaction |
Outline of Final Research Achievements |
We study the spin orbit interaction in Ge/Si core/shell nanowires and identify short electrically tunable spin orbit lengths suitable for spin based electronic devices and the realization of Majorana Fermions. We develop techniques to produce transparent contacts to Ge/Si nanowires using high magnetic critical field superconductors. Toward the detection of Majorana Fermions we develop a measurement system to study the ac-Josephson effect in topological Josephson junction. Initial studies were performed on the well established HgTe based topological insulator system in which we detect evidence for a 4-pi periodic supercurrent expected for Majorana modes.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] Josephson Radiation from Gapless Andreev Bound States in HgTe-Based Topological Junctions2017
Author(s)
R.S. Deacon, J. Wiedenmann, E. Bocquillon, F. Dominguez, T.M. Klapwijk, P. Leubner, C. Brune, E.M. Hankiewicz, S. Tarucha, K. Ishibashi, H. Buhmann, and L.W. Molenkamp
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Journal Title
Physical Review X
Volume: 7
Issue: 2
Pages: 021011-021011
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Supercurrent in the quantum Hall regime2016
Author(s)
F. Amet, C. T. Ke, I. V. Borzenets, Y-M. Wang, K. Watanabe, T. Taniguchi, R. S. Deacon, M. Yamamoto, Y. Bomze, S. Tarucha, G. Finkelstein
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Journal Title
Science
Volume: 382
Issue: 6288
Pages: 966-969
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] 4pi-periodic Josephson supercurrent in HgTe-based topological Josephson junctions2015
Author(s)
J. Wiedenmann, E. Bocquillon, R.S. Deacon, S. Hartinger, O. Herrmann, T.M. Klapwijk, L. Maier, C. Ames, C. Bru¨ne, C. Gould, A. Oiwa, K. Ishibashi, S. Tarucha, H. Buhmann & L.W. Molenkamp
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Journal Title
Nature Commun.
Volume: 7
Issue: 1
Pages: 10303-10303
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Gapless Andreev Bound States in HgTe topological Josephson junctions2016
Author(s)
R.S. Deacon, J. Wiedenmann, E. Bocquillon, S. Hartinger, O. Herrmann, T.M. Klapwijk, L. Maier, C. Ames, C. Brune, C. Gould, A. Oiwa, K. Ishibashi, S. Tarucha, H. Buhmann, and L.W. Molenkamp
Organizer
International Symposium on Dynamics in Artifical Quantum Systems
Place of Presentation
Tokyo University, Komaba, Japan.
Year and Date
2016-01-12
Related Report
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[Presentation] Anomalous Shapiro steps in strained HgTe Josephson junctions2015
Author(s)
R.S. Deacon, J. Wiedenmann, E. Bocquillon, S. Hartinger, O. Herrmann, T.M. Klapwijk, L. Maier, C. Ames, C. Brune, C. Gould, A. Oiwa, K. Ishibashi, S. Tarucha, H. Buhmann, and L.W. Molenkamp
Organizer
1st Annual symposium of Topological Materials Science
Place of Presentation
Kyoto University, Japan.
Year and Date
2015-12-11
Related Report
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[Presentation] Zero-energy Andreev bound states in a HgTe topological Josephson junction2015
Author(s)
R.S. Deacon, J. Wiedenmann, E. Bocquillon, S. Hartinger, O. Herrmann, T.M. Klapwijk, L. Maier, C. Ames, C. Brune, C. Gould, A. Oiwa, K. Ishibashi, S. Tarucha, H. Buhmann, and L.W. Molenkamp
Organizer
ISNTT2015, Atsugi, Japan. November 18th 2015.
Place of Presentation
NTT, Atsugi, Japan.
Year and Date
2015-11-17
Related Report