Abstract
We calculated, using the time-dependent Ginzburg-Landau equation with thermal noise, the transverse thermoelectric conductivity ${\ensuremath{\alpha}}_{xy}$ and the Nernst signal ${e}_{N}$, describing the Nernst effect, in type-II superconductor in the vortex-liquid regime. The Gaussian method used is an elaboration of the Hartree-Fock utilized by Ullah and Dorsey [Phys. Rev. Lett. 65, 2066 (1990)]. An additional assumption often made in analytical calculations that only the lowest Landau level significantly contributes to physical quantities of interest in the high-field limit is lifted by including all the Landau levels. The resulting values in two dimensions are significantly lower than the numerical simulation data of the same model but are in reasonably good quantitative agreement with experimental data on ${\text{La}}_{2}{\text{SrCuO}}_{4}$ above the irreversibility line (below the irreversibility line at which ${\ensuremath{\alpha}}_{xy}$ diverges and theory should be modified by including pinning effects). The values of ${e}_{N}$ calculated in three dimensions are also in good quantitative agreement with experimental data for temperature close to ${T}_{c}$ on ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{7}$. For each of the materials we consider, the melting and the irreversibility lines are also fitted with the same set of parameters using a recent quantitative Ginzburg-Landau theory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.