Journal
PHYSICAL REVIEW B
Volume 90, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.205422
Keywords
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Funding
- US Department of Energy, Office of Basic Energy Sciences for support through Columbia Energy Frontier Research Center [DE-SC0001085]
- National Science Foundation [DMR-1122594, DMR-1124894]
- NSF through an IGERT Fellowship [DGE-1069240]
- Alexander von Humboldt Foundation through a Feodor Lynen Research Fellowship
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1124894] Funding Source: National Science Foundation
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We report a determination of the complex in-plane dielectric function of monolayers of four transition-metal dichalcogenides: MoS2, MoSe2, WS2, and WSe2, for photon energies from 1.5 to 3 eV. The results were obtained from reflection spectra using a Kramers-Kronig constrained variational analysis. From the dielectric functions, we obtain the absolute absorbance of the monolayers. We also provide a comparison of the dielectric function for the monolayers with the corresponding bulk materials.
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