Abstract

This paper presents the results of studies of the temperature and field dependences of the resistivity tensor of the electron-doped superconductor Nd_{2 – x}Ce_xCuO₄ (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 (dρ_ab/dT > 0) and nonmetallic temperature dependence of conductivity in the direction of the c‑axis (dρ_c/dT < 0) due to incoherent tunneling and thermal activation through barriers between the CuO₂ conducting layers. The specificities of the behavior of the magnetoresistivity ρ_xx(B) and the Hall resistivity ρ_xy(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.

中文翻译：

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各向异性电子掺杂超导体 Nd2 – xCexCuO4 中电荷和涡旋子系统的相互作用

摘要

本文介绍了电子掺杂超导体 Nd _{2 – x} Ce _x CuO ₄ (0.12 ≤ x ≤ 0.20) 在 CuO ₂导电平面和垂直于CuO ₂平面。_{这些结果在 CuO 2}导电平面中具有高金属电导率 (dρ _ab /d T > 0) 和c轴方向上电导率的非金属温度依赖性的系统的准二维概念内成功解释(dρ _c /dT < 0）由于非相干隧穿和通过CuO ₂导电层之间的势垒的热激活。混合（电阻）状态下磁阻率 ρ _xx ( B ) 和霍尔电阻率 ρ _xy ( B ) 的特性与交叉磁通流态中 Abrikosov 和 Josephson 涡旋的横向运动动力学有关电场和磁场。