Size-effect of Kondo scattering in point contacts (revisited)

• Veröffentlicht in: Физика низких температур
• Datum: 1998
• Hauptverfasser: Yanson, I.K., Fisun, V.V., Bobrov, N.L., Mydosh, J.A., van Ruitenbeek, J.M.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 1998
• Schlagworte: Электpонные свойства металлов и сплавов
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/175545
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Size-effect of Kondo scattering in point contacts (revisited) / I.K. Yanson, V.V. Fisun, N.L. Bobrov, J.A. Mydosh, J.M. van Ruitenbeek // Физика низких температур. — 1998. — Т. 24, № 7. — С. 654-660. — Бібліогр.: 27 назв. — англ.

The size-effect of Kondo-scattering in nanometer-sized metallic point contacts is measured with the simplified, mechanically-controlled break-junction technique for CuMn alloy of different Mn concentrations: 0.017; 0.035; and 0.18 (± 0.017) at.%. The results are compared with our previous publication on nominally 0.1 at.% CuMn alloy [1,2]. The increase of width of the Kondo resonance and enhanced ratio of Kondo-peak intensity to electron-phonon scattering intensity is observed for contacts with sizes smaller than 10 nm. From the comparison of electron-phonon scattering intensity for the pressure-type contacts, which correspond to the clean orifice model, we conclude that the size effect is observed in clean contacts with the shape of a channel (nanowire).