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

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

Тема: Свеpхпpоводимость, в том числе высокотемпеpатуpная

Інший ID: PACS: 74.72.Bk;74.45.+c;74.20.Rp;74.62.Dh

URI: http://dspace.nbuv.gov.ua/handle/123456789/117871

Посилання: Possibility of a s-wave pairing in heavily Zn-doped YBa₂Cu₃O₇₋δ based on magnetic field effect on Andreev reflection spectra / A.I. Akimenko, V.A. Gudimenko // Физика низких температур. — 2008. — Т. 34, № 11. — С. 1122–1126. — Бібліогр.: 42 назв. — англ.

Дата: 2008

Завантажень: 331

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

Анотація:

When the dx₂₋y₂ -wave pairing is suppressed by Zn-doping in YBa₂Cu₃O₇₋δ 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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