Magnetoresistance and Hall Effect in Electron-Doped Superconductor Nd2-xCexCuO4+delta with Different Degrees of Nonstoichiometric Disorder: A Two-Band Model

作者：Charikova T B^*; Kharus G I; Shelushinina N G; Neverov V N; Petukhov D S; Ivanov A A

来源：Physics of Metals and Metallography, 2014, 115(5): 446-456.

DOI：10.1134/S0031918X14050032

• galvanomagnetic effects
• nonstoichiometric disorder
• electron-doped cuprate superconductors

Investigations have been performed on the magnetic-field dependences of the longitudinal and Hall resistivity of the electron-doped Nd2-xCexCuO4+delta system with an optimum content of cerium (x = 0.15) and different degree of the nonstoichiometric disorder in magnetic fields of up to 8 T (B vertical bar vertical bar c; J vertical bar vertical bar ab) in a temperature range of 0.4-4.2 K. The observed anomalous dependences of the Hall coefficient R(B) along with the dependences of the electrical resistivity rho(B) have been interpreted based on the Drude-Lorentz model in the case of the normal state and in the Bardeen-Stephen model in the mixed state modified with allowance for the coexistence of two types of charge carriers with the opposite charge signs (electrons and holes).

• 出版日期2014-5