Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Size-effect of Kondo scattering by Fe impurities in Cu point contacts
Репозиторій DSpace/Manakin
JavaScript is disabled for your browser. Some features of this site may not work without it.
Size-effect of Kondo scattering by Fe impurities in Cu point contacts
Тема:
Электpонные свойства металлов и сплавов
УДК:
537.6
Посилання:
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.
Підтримка:
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).
Дата:
1996
Переглядів:
333
Завантажень:
136
Анотація:
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.
