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

We present the investigation results of the in-plane ρ(T) resistivity tensor at the temperature range 0.4–40 K in magnetic fields up to 90 kOe (H || c, J || ab) for electron-doped Nd2−xCexCuO4+δ with different degree of disorder near antiferromagnetic-superconducting phase boundary. We have experime...

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Veröffentlicht in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2015-02, Vol.41 (2), p.125-128
Hauptverfasser: Charikova, T. B., Shelushinina, N. G., Harus, G. I., Neverov, V. N., Petukhov, D. S., Petukhova, O. E., Ivanov, A. A.
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Sprache:eng
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Zusammenfassung:We present the investigation results of the in-plane ρ(T) resistivity tensor at the temperature range 0.4–40 K in magnetic fields up to 90 kOe (H || c, J || ab) for electron-doped Nd2−xCexCuO4+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 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.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.4906538