Abstract
The electronic and optical properties of armchair MoS\(_{2}\) nanoribbons with multiple stacking faults are investigated using first-principles calculations. It’s interesting that the band gaps approach zero for armchair MoS\(_{2}\) nanoribbons with two and four stacking faults. The gaps of armchair MoS\(_{2}\) nanoribbons with one stacking fault and three stacking faults are converged to 0.46 eV and 0.36 eV, respectively, which is smaller than perfect MoS\(_{2}\) nanoribbons. The partial charge density of armchair MoS\(_{2}\) nanoribbons with two stacking faults shows that the defect levels are originated from stacking faults. The frequency-dependent optical response (dielectric function, absorption, reflectance and electron energy loss spectra) is also presented. The optical results of monolayer MoS\(_{2}\) are in agreement with previous study. The peaks in the imaginary part of perfect armchair MoS\(_{2}\) nanoribbons are about 2.8 eV, 4.0 eV and 5.4 eV and the peaks of the imaginary part of armchair MoS\(_{2}\) nanoribbons with stacking faults are mainly 2.8 eV and 5.4 eV. They are independent of ribbon width. The peaks in electron energy loss spectra move toward larger wavelengths (redshift) due to the introduction of stacking faults.
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Acknowledgements
The work was supported by a Science Challenge Project (No. TZ2016003) and Projects supported by the Natural Science Foundation of China (11104361) and the Fundamental Research Funds for the Central Universities (2018CDXYWU0025).
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Xu, W., Wang, J., Laref, A. et al. Effects of Multiple Stacking Faults on the Electronic and Optical Properties of Armchair MoS\(_{2}\) Nanoribbons: First-Principles Calculations. J. Electron. Mater. 47, 7114–7128 (2018). https://doi.org/10.1007/s11664-018-6642-6
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DOI: https://doi.org/10.1007/s11664-018-6642-6