Nernst and Ettingshausen effects in the Laughlin geometry
S.G. Sharapov, A.A. Varlamov, C. Goupil, A.V. Kavokin
TL;DR
This paper presents a thermodynamic cycle visualization of the Nernst and Ettingshausen effects in Laughlin geometry, revealing their fundamental thermodynamic origins and expressing related coefficients through entropy ratios.
Contribution
It introduces a reversible thermodynamic cycle approach to analyze these effects, excluding kinetic contributions, and links thermoelectric coefficients to entropy per magnetic flux.
Findings
Thermodynamic cycle visualization of Nernst effect
Expression of thermoelectric coefficients via entropy ratio
Insight into thermodynamic origin of magnetization currents
Abstract
The ideal reversible thermodynamic cycle visualization of the Nernst effect in Laughlin geometry, excluding the kinetic contribution is proposed. The Ettingshausen effect is also treated in the fashion using the reverse cycle. The corresponding values of the off-diagonal thermoelectric coefficients are expressed through the ratio of the entropy budget per magnetic flux. Our approach enlightens the profound thermodynamic origin of the relation between the Nernst effect and magnetization currents.
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