Complex conductivity in strongly fluctuating layered superconductors

Condensed Matter Physics

关键词: time-dependent Ginzburg-Landau;    complex conductivity;    type-II superconductor;   

DOI  :  10.5488/CMP.17.13703

来源: DOAJ

【 摘 要 】

The time-dependent Ginzburg-Landau approach is used to calculate the complex fluctuation conductivity in layered type-II superconductor under magnetic field. Layered structure of the superconductor is accounted for by means of the Lawrence-Doniach model, while the nonlinear interaction term in dynamics is treated within self-consistent Gaussian approximation. In high-T_c materials large portion of the H-T diagram belongs to vortex liquid phase. The expressions summing contributions of all the Landau levels are presented in explicit form which are applicable essentially to whole this phase and are compared to experimental data on high-T_c superconductor YBa₂Cu₃O_7-δ. Above the crossover to the "normal phase" our results agree with previously obtained.

【 授权许可】

Unknown