Correlation effects on the electronic structure of half-metallic CrAs in zinc-blende structure are studied for different substrate lattice constants. Depending on the substrate the spectral weight of the non-quasiparticle states might be tuned from a well developed value in the case of InAs substrate to an almost negligible contribution for the GaAs one. A piezoelectric material that would allow the change in the substrate lattice parameters opens the possibility for practical investigations of the switchable (tunable) non-quasiparticle states. Since the latter are important for the tunneling magnetoresistance and related phenomena it creates new opportunities in spintronics.
@article{arxiv.cond-mat/0501279,
title = {Tunable spin transport in CrAs: role of correlation effects},
author = {L. Chioncel and M. I. Katsnelson and G. A. de Wijs and R. A. de Groot and A. I. Lichtenstein},
journal= {arXiv preprint arXiv:cond-mat/0501279},
year = {2009}
}