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The Interplay of the Charge and Vortex Subsystems in Anisotropic Electron-Doped Superconductor Nd2 – xCexCuO4

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Abstract

This paper presents the results of studies of the temperature and field dependences of the resistivity tensor of the electron-doped superconductor Nd2 – xCexCuO4 (0.12 ≤ x ≤ 0.20) in the CuO2 conducting planes and in the direction perpendicular to the CuO2 planes. These results are successfully interpreted within the concept of quasi-two-dimensionality of the systems with high metallic conductivity in the CuO2 conducting planes (dρab/dT > 0) and nonmetallic temperature dependence of conductivity in the direction of the c‑axis (dρc/dT < 0) due to incoherent tunneling and thermal activation through barriers between the CuO2 conducting layers. The specificities of the behavior of the magnetoresistivity ρxx(B) and the Hall resistivity ρxy(B) in the mixed (resistive) state are associated with the dynamics of the transverse motion of Abrikosov and Josephson vortices in the flux flow regime in crossed electric and magnetic fields.

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ACKNOWLEDGMENTS

We are grateful to A.A. Ivanov for creative production of samples, S.M. Podgornykh for the Hall resistivity measurements on the PPMS 9 device, carried out at the Center for Collective Use of the Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, and to E.F. Talantsev for fruitful cooperation.

Funding

This work was carried out as part of the state assignment on the topics “Function” no. AAAA-A19-119012990095-0 and “Electron” no. AAAA-A18-118020190098-5 and was supported by the Russian Foundation for Basic Research and the Sverdlovsk region as part of the scientific project no. 20-42-660004.

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  1. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, 620990, Ekaterinburg, Russia

    A. S. Klepikova, O. E. Petukhova, M. R. Popov, N. G. Shelushinina & T. B. Charikova

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  1. A. S. Klepikova
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Klepikova, A.S., Petukhova, O.E., Popov, M.R. et al. The Interplay of the Charge and Vortex Subsystems in Anisotropic Electron-Doped Superconductor Nd2 – xCexCuO4. Phys. Metals Metallogr. 123, 114–137 (2022). https://doi.org/10.1134/S0031918X22020053

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