{"id":"https://openalex.org/G4152017779","display_name":"Study on odd frequency Cooper pairs at junction interfaces in tunneling phenomena","description":"In this work, I have studied on odd frequency Cooper pairs at junction interfaces between a ferromagnet and a superconductor. I have clarified several topics as follows:1. I synthesized Heusler alloys Co_<2-x> Fe_xMnSi and Ru_<2-x> Fe_xCrSi, which are expected as half-metal by the first-principles band calculations. Those materials are candidates of half-metal.2. The spin polarization of Co_<2-x> Fe_xMnSi is independent of composition x and is equal to approximately 50%.3. The spin polarization of Ru_<2-x> Fe_xCrSi is maximum value of 63% in the case of x=1. 8.4. I succeed in fabricating fully-epitaxial NbN/Co_2MnSi and NbN/Co_2FeSi bilayers and those nano-junctions in order to trap the odd frequency Cooper pairs.5. I observed a large zero-bias peak in differential conductance of NbN/Co_2MnSi nano-junctions. The phenomenon are not explained by the modified Blonder-Tinkham-Klapwijk(BTK) model and indicates generations of odd frequency pairs at the junction interface.","funder_award_id":"21740259","funder":{"id":"https://openalex.org/F4320334764","display_name":"Japan Society for the Promotion of Science","doi":"10.13039/501100001691"},"funded_outputs":["https://openalex.org/W1533326113","https://openalex.org/W1996243161","https://openalex.org/W2021747125","https://openalex.org/W2024609290","https://openalex.org/W2058429213","https://openalex.org/W2073451863","https://openalex.org/W2076599503","https://openalex.org/W2083462076","https://openalex.org/W2092552404"],"funded_outputs_count":9,"parent_awards":[],"sub_awards":[],"sub_awards_count":0,"amount":4420000.0,"currency":"JPY","amount_usd":null,"amount_usd_basis":null,"recipients":[],"recipient_countries":[],"recipient_regions":[],"research_scope":{"is_research":true,"basis":"funder_default","tier":1},"funding_type":"fellowship","funder_scheme":"Grant-in-Aid for Young Scientists (B)","start_date":null,"end_date":null,"start_year":null,"end_year":null,"landing_page_url":"https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21740259/","doi":null,"provenance":"kaken","lead_investigator":{"given_name":"Iduru","family_name":"SHIGETA","orcid":null,"role_start":null,"affiliation":{"name":"Kagoshima University","country":"Japan","ids":[{"id":"https://nrid.nii.ac.jp/nrid/1000030370050","type":"nrid","asserted_by":"kaken"}]}},"co_lead_investigator":null,"investigators":null,"works_api_url":"https://api.openalex.org/works?filter=awards.id:G4152017779","primary_topic":{"id":"https://openalex.org/T12200","display_name":"Heusler alloys: electronic and magnetic properties","score":0.8349,"subfield":{"id":"https://openalex.org/subfields/2504","display_name":"Electronic, Optical and Magnetic Materials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12200","display_name":"Heusler alloys: electronic and magnetic properties","score":0.8349,"subfield":{"id":"https://openalex.org/subfields/2504","display_name":"Electronic, Optical and Magnetic Materials"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"institution_awarded":[{"id":"https://openalex.org/I107139324","display_name":"Kagoshima University","ror":"https://ror.org/03ss88z23","country_code":"JP","type":"education","lineage":["https://openalex.org/I107139324"]}],"updated_date":"2026-10-16T03:01:01.000Z","created_date":"2026-07-13T04:17:19.000Z"}