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

• Published in: arXiv.org
• Main Authors: Charikova, T B, Shelushinina, N G, Harus, G I, Neverov, V N, Petukhov, D S, Petukhova, O E, Ivanov, A A
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 02.09.2014
• Subjects: Antiferromagnetism; Critical field (superconductivity); Critical temperature; Phase boundaries; Physics - Superconductivity; Tensors; Transition temperature
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1409.0608

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+{\delta}} 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.