FEATURES OF THE CURRENT-VOLTAGE CHARACTERISTICS OF LAYERED HIGH-TEMPERATURE SUPERCONDUCTORS

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The paper presents the results of measurements of the current-voltage characteristics (IVC’s) in the electron-doped layered superconductor Nd2–xCexCuO4 and the results of the scaling analysis of the U(I) dependence for a large set of layered HTSC’s. It is shown that the IVC’s of hole-doped compounds indicate a monotonic behavior of the d-wave symmetry order parameter, while the IVC’s of electron-doped compounds Nd2–xCexCuO4 with x = 0.15 and Sm2–xCexCuO4 exhibit a non-monotonic nature of the d-wave symmetry order parameter associated with the coexistence of superconductivity and fluctuations of antiferromagnetic spin excitations.

作者简介

Tatiana Charikova

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences

Email: charikova@imp.uran.ru
俄罗斯联邦, Ekaterinburg, 620108 Russia

Nina Shelushinina

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences

Email: shel@imp.uran.ru
俄罗斯联邦, Ekaterinburg, 620108 Russia

Vladimir Neverov

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences

Email: neverov@imp.uran.ru
俄罗斯联邦, Ekaterinburg, 620108 Russia

Mikhail Popov

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences

编辑信件的主要联系方式.
Email: popov_mr@imp.uran.ru

кандидат физико-математических наук, старший научный сотрудник лаборатории полупроводников и полуметаллов

俄罗斯联邦, Ekaterinburg, 620108 Russia

Andrei Ivanov

National Research Nuclear University MEPhI

Email: aaivanov@mephi.ru
俄罗斯联邦, Moscow, 115409 Russia

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