DOI:10.5488/CMP.17.13703 arXiv:1403.5069
Title:
Complex conductivity in strongly fluctuating layered superconductors
Author(s):
| B.D. Tinh (Department of Physics, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi, Vietnam) | |
| L.M. Thu (Department of Physics, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi, Vietnam) | |
| L.V. Hoa (Department of Physics, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi, Vietnam) |
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-Tc 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-Tc superconductor YBa2Cu3O7-δ. Above the crossover to the "normal phase" our results agree with previously obtained.
Key words:
time-dependent Ginzburg-Landau, complex conductivity, type-II superconductor
PACS:
74.40.Gh, 74.25.fc, 74.20.De
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