arXiv subjects

O. E. Sochinskaya

Publications and source records attributed to O. E. Sochinskaya.

2 recordsLinked to original sources

arXiv2010

The estimation of coherence length for electron-doped superconductor Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$

Results of low-temperature upper critical field measurements for Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$ single crystals with various $x$ and nonstoichiometric disorder ($δ$) are presented. The coherence length of pair correlation $ξ$ and the product $k_F$$ξ$, where $k_F$ is the Fermi wave vector, are estimated. It is shown that for investigated single crystals parameter $k_F$$ξ$ $\cong$ 100 and thus phenomenologically NdCeCuO - system is in a range of Cooper-pair-based (BCS) superconductivity.

cond-mat.supr-con↗

arXiv2010

Anomalous behavior of the Hall effect in electron-doped superconductor $Nd_{2-x}$Ce_{x}Cu$O_{4+δ} with nonstoichiometric disorder

Magnetoresistivity and Hall effect measured in magnetic fields up to B=9T (B||c, J||ab) in electron-doped $Nd_{2-x}$Ce_{x}Cu$O_{4+δ} single crystal films with x = 0.14; 0.15; 0.18 and different oxygen content (δ) were studied in a temperature range of 0.4-4.2 K. The resistivity and Hall coefficient behaviors in the mixed state are discussed in the framework of flux-flow model with the inclusion of the back-flow of vortices owing to the pinning forces.

cond-mat.supr-con↗