期刊
PHYSICAL REVIEW B
卷 85, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.205302
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资金
- National Science Foundation [DMR-1104595]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104595] Funding Source: National Science Foundation
Quasiparticle self-consistent GW calculations of the band structures and related effective-mass parameters are carried out for bulk, monolayer, and bilayer MoS2. Including excitonic effects within the Mott-Wannier theory, quantitative agreement is obtained between the A, B excitons, measured by absorption [Phys. Rev. Lett. 105, 136805 (2010)], and the calculated exciton gap energies at K. The A-B 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.
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