Photoproduction in semiconductors by onset of magnetic field

TL;DR

This paper investigates how an external magnetic field affects semiconductor energy bands, causing radiative emissions and potential cooling effects, with calculations indicating detectable radiation and cooling via oscillating magnetic fields.

Contribution

It introduces a theoretical analysis of magnetic field-induced band lowering and radiative processes in semiconductors, proposing a novel cooling method using oscillating magnetic fields.

Findings

Radiated energy from magnetic field application is quantifiable.

Electrons settle into a new Fermi distribution after magnetic field application.

Semiconductors can potentially be cooled using oscillating magnetic fields.

Abstract

The energy bands of a semiconductor are lowered by an external magnetic field. When a field is switched on, the straight-line trajectories near the top of the occupied valence band are curved into Landau orbits and Bremsstrahlung is emitted until the electrons have settled in their final Fermi distribution. We calculate the radiated energy, which should be experimentally detectable, and suggest that a semiconductor can be cooled by an oscillating magnetic field.