Spin-resolved photoemission study of epitaxially grown MoSe2 and WSe2 thin films

Few-layer thick MoSe2 and WSe2 possess non-trivial spin textures with sizable spin splitting due to the inversion symmetry breaking embedded in the crystal structure and strong spin-orbit coupling. We report a spin-resolved photoemission study of MoSe2 and WSe2 thin film samples epitaxially grown on a bilayer graphene substrate. We only found spin polarization in the single-and trilayer samples-not in the bilayer sample-mostly along the out-of-plane direction of the sample surface. The measured spin polarization is found to be strongly dependent on the light polarization as well as the measurement geometry, which reveals intricate coupling between the spin and orbital degrees of freedom in this class of material.


Published in:
Journal Of Physics-Condensed Matter, 28, 45, 454001
Year:
2016
Publisher:
Bristol, Institute of Physics
ISSN:
0953-8984
Keywords:
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 Record created 2016-11-21, last modified 2018-03-17

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