Point-contact-spectroscopy investigation of the Kondo size effect in CuCr and AuFe alloys

Электpонные свойства металлов и сплавов

Автор(и)

  • V. V. Fisun B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine 47, Lenin Ave. , 61164, Kharkov, Ukraine
  • I. K. Yanson B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine 47, Lenin Ave. , 61164, Kharkov, Ukraine
  • J. A. Mydosh Kamerlingh Onnes Laboratorium, Leiden University, PO Box 9504, NL-2300 RA Leiden, The Netherlands
  • J. M. van Ruitenbeek Kamerlingh Onnes Laboratorium, Leiden University, PO Box 9504, NL-2300 RA Leiden, The Netherlands

DOI:

https://doi.org/10.1063/1.1306406

Ключові слова:

PACS: 72.15.Qm, 75.20.Hr

Анотація

Size effects in Kondo scattering are studied on CuCr and AuFe alloys (TK=2K and 0.2K, respectively) by applying point-contact spectroscopy in break-junction type contacts. It is shown that as the contact diameter is decreased under the condition of ballistic electron transport, the size effect enhances the interaction of the conduction electrons with the Kondo impurity ( as compared to the phonons) and increases the Kondo temperature in the contact region. In an external magnetic field the size effect decreases the negative magnetoresistance in CuCr and suppresses the Kondo peak splitting in AuFe.

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Опубліковано

2000-07-10

Як цитувати

(1)
Fisun, V. V.; Yanson, I. K.; Mydosh, J. A.; Ruitenbeek, J. M. van. Point-Contact-Spectroscopy Investigation of the Kondo Size Effect in CuCr and AuFe Alloys: Электpонные свойства металлов и сплавов. Fiz. Nizk. Temp. 2000, 26, 681-686.

Номер

Том 26 № 7 (2000)

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