Possibility of a s-wave pairing in heavily Zn-doped YBa2Cu3O7-d based on magnetic field effect on Andreev reflection spectra

Автор(и)

  • A.I. Akimenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • V.A. Gudimenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine

DOI:

https://doi.org/10.1063/1.3009579

Ключові слова:

Y-based cuprates, Andreev reflection, N-S boundary, pairing symmetries, s wave, d wave, doping and substitution.

Анотація

When the dx2-y2-wave pairing is suppressed by Zn-doping in YBa2Cu3O7-d some of the Andreev reflection spectra were found to be similar to the s-wave spectra of conventional superconductors. The energy gap is rather reproducible (2.3–3.0 meV). It is suppressed by low magnetic field (HcPC = 120–270 mT) in great contrast to the d-wave spectra (HcPC > 3 T) with the similar order of gap magnitude. We suppose that the s-wave pairing occurs near the Zn impurities.

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Опубліковано

2008-10-02

Як цитувати

(1)
Akimenko, A.; Gudimenko, V. Possibility of a S-Wave Pairing in Heavily Zn-Doped YBa2Cu3O7-d Based on Magnetic Field Effect on Andreev Reflection Spectra. Fiz. Nizk. Temp. 2008, 34, 1122-1126.

Номер

Том 34 № 11 (2008)

Розділ

Надпровідність, зокрема високотемпературна