Magnetization Currents of Fluctuative Cooper Pairs

TL;DR

This paper explains the large Nernst-Ettingshausen effect observed in superconductors above the critical temperature by analyzing the magnetization currents of virtual Cooper pairs, revealing complex magnetic field dependencies.

Contribution

It introduces a theoretical approach to account for the magnetization current of virtual Cooper pairs, clarifying the magnitude and behavior of thermoelectric effects in superconductors.

Findings

Nernst-Ettingshausen effect is much stronger than the Seebeck effect above Tc.

Magnetization currents of virtual Cooper pairs explain the effect's magnitude.

Non-monotonic magnetic field dependence of the Nernst coefficient is elucidated.

Abstract

Recent experiments show that the Nernst-Ettingshausen effect is orders of magnitude stronger than the thermoelectric Seebeck effect in superconductors above the critical temperature. We explain different magnitudes of the two effects accounting for the magnetization current of virtual Cooper pairs. The method allows for detailed understanding of the surprising non-monotonic dependence of the Nernst-Ettingshausen coefficient on the magnetic field.