Issue
EPL
Volume 81, Number 5, March 2008
Article Number 57001
Number of page(s) 4
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/81/57001
Published online 31 January 2008
EPL, 81 (2008) 57001
DOI: 10.1209/0295-5075/81/57001

Photoproduction in semiconductors by onset of magnetic field

H. Kleinert1 and S.-S. Xue2, 3

1  Institut für Theoretische Physik, Freie Universität Berlin - 14195 Berlin, Germany
2  ICRANet - Piazzale della Repubblica, 10, 65122 Pescara, Italy
3  Physics Department, University of Rome "La Sapienza" - Rome, Italy

kleinert@physik.fu-berlin.de
xue@icra.it

received 4 June 2007; accepted in final form 4 January 2008; published March 2008
published online 31 January 2008

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.

PACS
71.55.Cn - Elemental semiconductors.
71.70.Ej - Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect.
42.50.Xa - Optical tests of quantum theory.

© EPLA 2008