Point contact studies of the superconducting gap of CeRu2

Автор(и)

  • Yu. G. Naidyuk B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47, Lenin Ave., 310164, Kharkov, Ukraine
  • A. V. Moskalenko B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47, Lenin Ave., 310164, Kharkov, Ukraine
  • I. K. Yanson B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47, Lenin Ave., 310164, Kharkov, Ukraine
  • C. Geibel Institut fur Festkorperphysik, TU Darmstadt , D-64289 Darmstadt, Germany

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.593604

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Анотація

The measured dV/dI(V) curves of point contacts between the intermetallic compound CeRu2 in the superconducting state and the normal metal Cu correspond fairly well to the Blonder-Tinkham -Klapwijk model. It is used to obtain temperature and magnetic field dependence of the superconducting gap D. The D(T) dependence corresponds well to the BCS theory with 2D(0)/kbTc*=3.1±0.1. Additionally, a region of gapless superconductivity between Tc*»4,4-5,4K and Tcbulk»6.2K is found. The gap decreases approximately linearly in a magnetic field and vanishes in a field Bc*»3.5T, which is well below the upper critical field Bc2»6T and close to the irreversibility field.

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Опубліковано

1998-05-10

Як цитувати

(1)
Yu. G. Naidyuk, A. V. Moskalenko, I. K. Yanson, and C. Geibel, Point contact studies of the superconducting gap of CeRu2, Low Temp. Phys. 24, (1998) [Fiz. Nizk. Temp. 24, 495-497, (1998)] DOI: https://doi.org/10.1063/1.593604.

Номер

Том 24 № 5 (1998)

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