Magnetobreakdown oscillations of Nernst-Ettingshausen field in layered conductors

TL;DR

This paper investigates magnetic breakdown oscillations of the Nernst-Ettingshausen effect in layered conductors with complex Fermi surfaces, analyzing how magnetic field orientation influences thermoelectric oscillations.

Contribution

It introduces a model considering magnetic breakdown in layered conductors with a specific Fermi surface geometry and calculates the resulting thermoelectric oscillations under various magnetic field orientations.

Findings

Magnetic breakdown causes charge carriers to move between Fermi surface sheets.

Oscillations of thermoelectric fields depend on magnetic field orientation.

Nernst-Ettingshausen effect dominates under certain magnetic field angles.

Abstract

In the presented report, the Nernst-Ettingshausen effect in layered conductors is investigated. Considering a Fermi surface (FS) consisting of a slightly corrugated cylinder and two corrugated planes distributed periodically in the momentum space, the thermoelectric effects are considered under general assumptions for the value of a magnetic breakdown probability. As a result of an external generalized force, the FS sheets in layered conductors with a multisheet FS appear to be so close that the charge carriers (as a result of magnetic breakdown) can move from one FS sheet to another. In addition, the distribution functions of the charge carriers and the magnetic breakdown oscillations of thermoelectrical field along the normal to the layer, under different values and orientations of the magnetic field, $B$, are calculated. It is shown that if the magnetic field is deflected from the $xz$-plane at an angle $\varphi$, the oscillation part of a thermoelectrical field along the normal to the layer under condition $\sin\varphi\tan\vartheta \gg 1$ is mainly determined with the Nernst-Ettingshausen effect.