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arXiv · 1409.0608

Doping effect on the evolution of the pairing symmetry in n-type superconductor near antiferromagnetic phase boundary

T. B. Charikova·N. G. Shelushinina·G. I. Harus·V. N. Neverov·D. S. Petukhov·O. E. Petukhova·A. A. Ivanov
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Abstract

We present the investigation results of the in-plane \{rho}(T) resistivity tensor at the temperature range 0.4-40 K in magnetic fields up to 90kOe (H||c, J||ab) for electron-doped Nd{2-x}Ce{x}CuO{4+δ} with different degree of disorder near antiferromagnetic - superconducting phase boundary. We have experimentally found that for optimally doped compound both the upper critical field slope and the critical temperature decrease with increasing of the disorder parameter (d-wave pairing) while in the case of the underdoped system the critical temperature remains constant and (dHc2/dT)|Tc increases with increasing of the disorder (s-wave pairing). These features suggest a possible implementation of the complex mixture state as the (s+id)-pairing.

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T. B. Charikova, N. G. Shelushinina, G. I. Harus, V. N. Neverov, D. S. Petukhov, O. E. Petukhova, A. A. Ivanov. 2014-09-02. Doping effect on the evolution of the pairing symmetry in n-type superconductor near antiferromagnetic phase boundary. https://doi.org/10.1063/1.4906538

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