Quasi 2D electronic states with high spin-polarization in centrosymmetric MoS2 bulk crystals.

ABSTRACT: Time reversal dictates that nonmagnetic, centrosymmetric crystals cannot be spin-polarized as a whole. However, it has been recently shown that the electronic structure in these crystals can in fact show regions of high spin-polarization, as long as it is probed locally in real and in reciprocal space. In this article we present the first observation of this type of compensated polarization in MoS2 bulk crystals. Using spin- and angle-resolved photoemission spectroscopy (ARPES), we directly observed a spin-polarization of more than 65% for distinct valleys in the electronic band structure. By additionally evaluating the probing depth of our method, we find that these valence band states at the point in the Brillouin zone are close to fully polarized for the individual atomic trilayers of M

SUBMITTER: Gehlmann M 

PROVIDER: S-EPMC4887890 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature