Thermoelectric effect in layered conductors in a strong magnetic field

Kirichenko Kirichenko,Galbova Galbova,Ivanovski Ivanovski,Krstovska Krstovska,Peschansky Peschansky

doi:10.5488/cmp.9.4.757

Abstract

We have theoretically studied the thermoelectric effect in layered conductors with a quasi-two-dimensional electron energy spectrum of an arbitrary form in a quantizing magnetic field at low temperatures. Giant quantum oscillations of thermoelectric field versus the inverse magnetic field have been predicted, which will facilitate the experimental study of quantum oscillatory effects. Thermoelectric force in a layered conductor is shown to depend periodically upon the angle between the magnetic field direction and the normal to the layers. This orientation effect arises from the quasi-two-dimensional character of the charge carriers energy spectrum and is representative of layered conductors. Layered structures with sharply anisotropic metal type electrical conductivity have been intensively studied recently. The strong anisotropy of the kinetic coefficients of such conductors is attributed to the quasi-two-dimensional character of the energy spectrum for charge carriers. The dependence of the energy of conduction electrons on their momentum depends weakly on the momentum projection pz = pn along the normal n to the layers and can be represented in the form of a rapidly converging series

Highlights

Layered structures with sharply anisotropic metal type electrical conductivity have been intensively studied recently
The strong anisotropy of the kinetic coefficients of such conductors is attributed to the quasi-two-dimensional character of the energy spectrum for charge carriers
The maximum values εmk ax at the Fermi surface decrease significantly with increasing k so that εm1 ax = ηεF εF where the parameter of the quasi-two dimensionality η characterizes the anisotropy of the charge carriers spectrum

Summary

Introduction

Layered structures with sharply anisotropic metal type electrical conductivity have been intensively studied recently. The strong anisotropy of the kinetic coefficients of such conductors is attributed to the quasi-two-dimensional character of the energy spectrum for charge carriers. The dependence of the energy of conduction electrons on their momentum depends weakly on the momentum projection pz = pn along the normal n to the layers and can be represented in the form of a rapidly converging series ε(p) = εk(px, py) cos akpz

Results

Conclusion