Effect of interference between the electron-impurity and electron-phonon interactions upon the thermoelectric properties of alloys

Abstract

We calculate the thermoelectric power of a metal by considering particularly the particle-hole transformation symmetry. If there is complete symmetry with respect to this transformation, the thermopower is absent. However, the electron-phonon and the electron-impurity interactions are intrinsically such that they change sign under this transformation. Thus a finite thermopower arises due to an interference between different orders in a perturbation expansion in these interactions.

Structural and physical properties of the U9Fe7Ge24 uranium germanide

“…The heat current carried by the phonons scattered by the conduction electrons contributes to the previous existing thermoelectric field and is more important in the region where the electronephonon scattering is predominant (T ∼ q D /5) with q D ¼ 234 K [21]. The NielseneTaylor effect accounts for second-order effects, when interference processes between elastic scattering (electronephonon) and inelastic scattering (electroneimpurity) are important, and give rise to the scattering probability, which can contribute to the enhancement of thermopower in the low temperature regime [20,22] in a very similar way to the phonon-drag effect. The absolute values of thermopower remain on the level typical for broad band systems, without any prominent low-energy scale.…”

Onsager relations and time-reversal symmetry in nonlinear optics

“…Our derivation is based on the application of time-reversal symmetry to equation ( 2); although it is not explicitly discussed here, equivalent results may also be derived on the relevant correlation functions (e.g. Mahan 1981; see also Krempasky and Schmid 1979).…”

How Magnetic Field Enters Heat Current: Application to Fluctuation Nernst Effect

“…In this case, the Nernst coefficient combines PHAs of the thermoelectric, η, and Hall, σ xy , coefficients: N n ≃ η • σ xy . The interelectron interaction cannot change PHA of η and σ xy 22 . According to current points of view 9,14,15,16,17,18,19 , the interaction in the Cooper channel leads to the Nernst coefficient in the zeroth order in PHA.…”