Electronic excitation spectrum of an antiferromagnetic semiconductor (EuTe)

W. von der Linden, W. Nolting

Research output: Contribution to journalArticle

Abstract

We study the electronic quasiparticle spectrum of an antiferromagnetic semiconductor, with a special application to EuTe. By use of the commonly accepteds-f model it is shown that the conduction band splits into two quasiparticle subbands, where this splitting persists in the paramagnetic region (TtextgreaterT n ), too. Shape, width and degree of overlapping of the two subbands are strongly temperature dependent and quite different for different types off-spin arrangements.—We present furthermore a critical classification of mean field treatments (“Zener model”), which neglect all spin exchange processes between conduction electrons and localized moments. Within our many body approach the lower conduction band edge of EuTe does not shift significantly with temperature, in agreement with the experiment, while the Zener model predicts a drastic red shift upon cooling belowT n .
Original languageEnglish
Pages (from-to)191-199
Number of pages9
JournalZeitschrift für Physik / B
Volume48
Issue number3
DOIs
Publication statusPublished - 1 Sep 1982

Keywords

  • Condensed Matter, Fluids, Nonlinear Dynamics, Complex Systems, Chaos, Neural Networks, Physics, general, Solid State Physics and Spectroscopy, Superconductivity, Superfluidity, Quantum Fluids

Fingerprint Dive into the research topics of 'Electronic excitation spectrum of an antiferromagnetic semiconductor (EuTe)'. Together they form a unique fingerprint.

Cite this