Negative Longitudinal Magneto-Thermoelectric Power in a Semiconductor Parabolic Quantum Well

TL;DR

This paper provides a theoretical analysis of the thermoelectric power in a semiconductor parabolic quantum well under a longitudinal magnetic field, highlighting the impact of spin-splitting and magnetic field strength.

Contribution

It introduces a theoretical model that accounts for spin-splitting effects on thermoelectric power in quantum wells subjected to magnetic fields.

Findings

Thermoelectric power decreases with increasing magnetic field in strong confinement.

Spin-splitting causes a downward shift of the Zeeman-split subband.

Magnetic field influences thermoelectric properties via energy level shifts.

Abstract

We present a theoretical study of the electronic thermoelectric power of a semiconductor parabolic quantum well in a magnetic field. The case of a longitudinal magnetic field, with respect to the temperature gradient, has been considered. The calculations were carried out taking into account spin-splitting of the dimensionally quantized electronic energy levels. It has been shown that in the region of strong confinement the thermoelectric power decreases with increasing magnetic field, which is related to the downward shift of the lower Zeeman-split spin subband.