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 point-contact spect...
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| Дата: | 2013 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/118224 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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| id |
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irk-123456789-1182242017-05-30T03:02:36Z Andreev-reflection spectroscopy with superconducting indium — a case study Gloos, K. Tuuli, E. К 75-летию со дня рождения И. К. Янсона 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. 2013 Article 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 http://dspace.nbuv.gov.ua/handle/123456789/118224 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
К 75-летию со дня рождения И. К. Янсона К 75-летию со дня рождения И. К. Янсона |
| spellingShingle |
К 75-летию со дня рождения И. К. Янсона К 75-летию со дня рождения И. К. Янсона Gloos, K. Tuuli, E. Andreev-reflection spectroscopy with superconducting indium — a case study 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. |
| format |
Article |
| author |
Gloos, K. Tuuli, E. |
| author_facet |
Gloos, K. Tuuli, E. |
| author_sort |
Gloos, K. |
| title |
Andreev-reflection spectroscopy with superconducting indium — a case study |
| title_short |
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_sort |
andreev-reflection spectroscopy with superconducting indium — a case study |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2013 |
| topic_facet |
К 75-летию со дня рождения И. К. Янсона |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/118224 |
| 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. |
| series |
Физика низких температур |
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AT gloosk andreevreflectionspectroscopywithsuperconductingindiumacasestudy AT tuulie andreevreflectionspectroscopywithsuperconductingindiumacasestudy |
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2023-10-18T20:31:38Z |
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2023-10-18T20:31:38Z |
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1796150430336548864 |