Evidence of a s-Wave Pairing in Heavily Zn-doped $YBa_2Cu_3O_{7-δ}$ from Andreev Reflection Spectra

A. I. Akimenko; V. A. Gudimenko

doi:10.1063/1.3009579

paper

Evidence of a s-Wave Pairing in Heavily Zn-doped $Y B a_{2} C u_{3} O_{7 - δ}$ from Andreev Reflection Spectra

arXiv:0711.4527 · doi:10.1063/1.3009579

Abstract

When the $d_{x^{2} - y^{2}}$ -wave pairing is suppressed by Zn-doping in $Y B a_{2} C u_{3} O_{7 - δ}$ 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 (2.3-3.0meV). It is suppressed by low magnetic field ( $H_{C}^{P C} = 120 - 270 m T$ ) in great contrast to the d-wave spectra ( $H_{C}^{P C} > 3 T$ ) with the similar order of the gap value. We suppose that the s-wave pairing occurs near the Zn-impurities.

4 pages, 4 figures

Evidence of a s-Wave Pairing in Heavily Zn-doped YBa2​Cu3​O7−δ​ from Andreev Reflection Spectra

Abstract

References in corpus (3)

Evidence of a s-Wave Pairing in Heavily Zn-doped $Y B a_{2} C u_{3} O_{7 - δ}$ from Andreev Reflection Spectra