Size-effect of Kondo scattering by Fe impurities in Cu point contacts
The low temperature dVldl(V) characteristics are investigated for point contacts of various sizes (d ≈ 2-35 nm) using a mechanically controlled breakjunction of a Kondo alloy CuFe (0.1 at. %). A size effect, being manifested in an increase in the effective Kondo temperature with decreasing contact s...
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| Published in: | Физика низких температур |
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| Date: | 1996 |
| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
1996
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/176449 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Size-effect of Kondo scattering by Fe impurities in Cu point contacts / N. Van der Post, F. Mettes, J.A. Mydoch, J.M. van Ruitenbeek, I.K. Yanson // Физика низких температур. — 1996. — Т. 22, № 3. — С. 313-321. — Бібліогр.: 22 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862735743832555520 |
|---|---|
| author | Van der Post, N. Mettes, F. Mydoch, J.A. Ruitenbeek, J.M.van Yanson, I.K. |
| author_facet | Van der Post, N. Mettes, F. Mydoch, J.A. Ruitenbeek, J.M.van Yanson, I.K. |
| citation_txt | Size-effect of Kondo scattering by Fe impurities in Cu point contacts / N. Van der Post, F. Mettes, J.A. Mydoch, J.M. van Ruitenbeek, I.K. Yanson // Физика низких температур. — 1996. — Т. 22, № 3. — С. 313-321. — Бібліогр.: 22 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | The low temperature dVldl(V) characteristics are investigated for point contacts of various sizes (d ≈ 2-35 nm) using a mechanically controlled breakjunction of a Kondo alloy CuFe (0.1 at. %). A size effect, being manifested in an increase in the effective Kondo temperature with decreasing contact size, is found both on voltage and magnetic field dV/dl dependences. In accordance with the prediction of the Zarand-Udvardi theory the enhancement of the Kondo temperature in the CuFe alloy appears to be quantitatively much smaller than in CuMn alloy of the same concentration. This enhancement is due to the strong fluctuations of the local electron density of states in the ultrasmall metallic contacts. The Kondo temperature of a magnetic impurity provides a local probe of these fluctuations.
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| first_indexed | 2025-12-07T19:49:49Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-176449 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T19:49:49Z |
| publishDate | 1996 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Van der Post, N. Mettes, F. Mydoch, J.A. Ruitenbeek, J.M.van Yanson, I.K. 2021-02-04T17:36:52Z 2021-02-04T17:36:52Z 1996 Size-effect of Kondo scattering by Fe impurities in Cu point contacts / N. Van der Post, F. Mettes, J.A. Mydoch, J.M. van Ruitenbeek, I.K. Yanson // Физика низких температур. — 1996. — Т. 22, № 3. — С. 313-321. — Бібліогр.: 22 назв. — англ. 0132-6414 https://nasplib.isofts.kiev.ua/handle/123456789/176449 537.6 The low temperature dVldl(V) characteristics are investigated for point contacts of various sizes (d ≈ 2-35 nm) using a mechanically controlled breakjunction of a Kondo alloy CuFe (0.1 at. %). A size effect, being manifested in an increase in the effective Kondo temperature with decreasing contact size, is found both on voltage and magnetic field dV/dl dependences. In accordance with the prediction of the Zarand-Udvardi theory the enhancement of the Kondo temperature in the CuFe alloy appears to be quantitatively much smaller than in CuMn alloy of the same concentration. This enhancement is due to the strong fluctuations of the local electron density of states in the ultrasmall metallic contacts. The Kondo temperature of a magnetic impurity provides a local probe of these fluctuations. We acknowledge discussions with A. Zawadowski, G. Zarand, and J. Zaanen. Part of this work was supported by the Stichting voor Fundamenteel Onder-zoek der Materie (FOM) and the International Science Foundation (Soros Foundation). en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Электpонные свойства металлов и сплавов Size-effect of Kondo scattering by Fe impurities in Cu point contacts Article published earlier |
| spellingShingle | Size-effect of Kondo scattering by Fe impurities in Cu point contacts Van der Post, N. Mettes, F. Mydoch, J.A. Ruitenbeek, J.M.van Yanson, I.K. Электpонные свойства металлов и сплавов |
| title | Size-effect of Kondo scattering by Fe impurities in Cu point contacts |
| title_full | Size-effect of Kondo scattering by Fe impurities in Cu point contacts |
| title_fullStr | Size-effect of Kondo scattering by Fe impurities in Cu point contacts |
| title_full_unstemmed | Size-effect of Kondo scattering by Fe impurities in Cu point contacts |
| title_short | Size-effect of Kondo scattering by Fe impurities in Cu point contacts |
| title_sort | size-effect of kondo scattering by fe impurities in cu point contacts |
| topic | Электpонные свойства металлов и сплавов |
| topic_facet | Электpонные свойства металлов и сплавов |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/176449 |
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