Andreev-reflection spectroscopy with superconducting indium — a case study
We have investigated Andreev reflection at interfaces between superconducting indium (Tc = 3.4 K) and several
 normal conducting nonmagnetic metals (palladium, platinum, and silver) down to T = 0.1 K as well as zinc
 (Tc = 0.87 K) in its normal state at T = 2.5 K. We analyzed the poi...
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| Published in: | Физика низких температур |
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| Date: | 2013 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/118224 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Andreev-reflection spectroscopy with superconducting
 indium — a case study / K. Gloos, E. Tuuli // Физика низких температур. — 2013. — Т. 39, № 3. — С. 326–334. — Бібліогр.: 51 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862534223432253440 |
|---|---|
| author | Gloos, K. Tuuli, E. |
| author_facet | Gloos, K. Tuuli, E. |
| citation_txt | Andreev-reflection spectroscopy with superconducting
 indium — a case study / K. Gloos, E. Tuuli // Физика низких температур. — 2013. — Т. 39, № 3. — С. 326–334. — Бібліогр.: 51 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We have investigated Andreev reflection at interfaces between superconducting indium (Tc = 3.4 K) and several
normal conducting nonmagnetic metals (palladium, platinum, and silver) down to T = 0.1 K as well as zinc
(Tc = 0.87 K) in its normal state at T = 2.5 K. We analyzed the point-contact spectra with the modified onedimensional
BTK theory valid for ballistic transport. It includes Dynes’ quasiparticle lifetime as fitting parameter Γ
in addition to superconducting energy gap 2Δ and strength Z of the interface barrier. For contact areas from less than
1 nm² to 10000 nm² the BTK Z-parameter was close to 0.5, corresponding to transmission coefficients of about
80%, independent of the normal metal. The very small variation of Z indicates that the interfaces have a negligible
dielectric tunneling barrier. Also Fermi surface mismatch does not account for the observed Z. The extracted value
Z ≈ 0.5 can be explained by assuming that practically all of our point contacts are in the diffusive regime.
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| first_indexed | 2025-11-24T06:14:32Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-118224 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-24T06:14:32Z |
| publishDate | 2013 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Gloos, K. Tuuli, E. 2017-05-29T13:14:27Z 2017-05-29T13:14:27Z 2013 Andreev-reflection spectroscopy with superconducting
 indium — a case study / K. Gloos, E. Tuuli // Физика низких температур. — 2013. — Т. 39, № 3. — С. 326–334. — Бібліогр.: 51 назв. — англ. 0132-6414 PACS: 85.30.Hi, 73.40.–c, 74.45.+c https://nasplib.isofts.kiev.ua/handle/123456789/118224 We have investigated Andreev reflection at interfaces between superconducting indium (Tc = 3.4 K) and several
 normal conducting nonmagnetic metals (palladium, platinum, and silver) down to T = 0.1 K as well as zinc
 (Tc = 0.87 K) in its normal state at T = 2.5 K. We analyzed the point-contact spectra with the modified onedimensional
 BTK theory valid for ballistic transport. It includes Dynes’ quasiparticle lifetime as fitting parameter Γ
 in addition to superconducting energy gap 2Δ and strength Z of the interface barrier. For contact areas from less than
 1 nm² to 10000 nm² the BTK Z-parameter was close to 0.5, corresponding to transmission coefficients of about
 80%, independent of the normal metal. The very small variation of Z indicates that the interfaces have a negligible
 dielectric tunneling barrier. Also Fermi surface mismatch does not account for the observed Z. The extracted value
 Z ≈ 0.5 can be explained by assuming that practically all of our point contacts are in the diffusive regime. Elina Tuuli acknowledges a two-year grant from the
 Graduate School of Materials Research (GSMR), 20014
 Turku, Finland. We thank Yu.G. Naidyuk for discussions
 and the Jenny and Antti Wihuri Foundation for financial
 support. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 75-летию со дня рождения И. К. Янсона Andreev-reflection spectroscopy with superconducting indium — a case study Article published earlier |
| spellingShingle | Andreev-reflection spectroscopy with superconducting indium — a case study Gloos, K. Tuuli, E. К 75-летию со дня рождения И. К. Янсона |
| title | Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_full | Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_fullStr | Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_full_unstemmed | Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_short | Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_sort | andreev-reflection spectroscopy with superconducting indium — a case study |
| topic | К 75-летию со дня рождения И. К. Янсона |
| topic_facet | К 75-летию со дня рождения И. К. Янсона |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/118224 |
| work_keys_str_mv | AT gloosk andreevreflectionspectroscopywithsuperconductingindiumacasestudy AT tuulie andreevreflectionspectroscopywithsuperconductingindiumacasestudy |