Asymmetry and separation of spin tunneling time in ZnSe/Zn1-xMnxSe multilayers
Department of Physics, Tsinghua University, Beijing 100084,
2 Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Corresponding author: a email@example.com
Published online: 15 October 2001
We investigate characteristics of spin tunneling time in ZnSe/Ze1-xMnxSe multilayers under the influence of both an electric field and a magnetic field. The results indicate that the tunneling time shows complicated oscillations and significant spin separation for electrons with different spin orientations traversing semimagnetic semiconductor heterostructures. It is also shown that the tunneling time exhibits obvious asymmetry in opposite tunneling directions for electrons tunneling through asymmetric heterostructures, which mainly occurs in resonant regions. The degree of the asymmetry of the tunneling time is not only spin-polarization dependent but also external-field induced.
PACS: 72.25.-b – Spin polarized transport / 75.75.+a – Magnetic properties of nanostructures
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001