Publikationsdatum:
2015-02-28
Beschreibung:
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 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 dH c 2 /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.
Print ISSN:
1063-777X
Digitale ISSN:
1090-6517
Thema:
Physik
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