Abstract
Quasiparticle self-consistent calculations of the band structures and related effective-mass parameters are carried out for bulk, monolayer, and bilayer MoS. Including excitonic effects within the Mott-Wannier theory, quantitative agreement is obtained between the , excitons, measured by absorption [Phys. Rev. Lett. 105, 136805 (2010)], and the calculated exciton gap energies at . The - splitting arises from the valence-band splitting which in the monolayer is entirely due to spin-orbit coupling and leads to spin-split states, while in the bilayer it is a combined effect of interlayer and spin-orbit coupling.
- Received 25 March 2012
DOI:https://doi.org/10.1103/PhysRevB.85.205302
©2012 American Physical Society
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Physical Review B 50th Anniversary Milestones
These Milestone studies represent lasting contributions to physics by way of reporting significant discoveries, initiating new areas of research, or substantially enhancing the conceptual tools for making progress in the burgeoning field of condensed matter physics.