Optical absorption by Dirac excitons in single-layer transition-metal dichalcogenides

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2016
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Goerbig, Mark Oliver
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Physical Review B. 2016, 94(4), 041301. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.94.041301
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We develop an analytically solvable model able to qualitatively explain nonhydrogenic exciton spectra observed recently in two-dimensional (2D) semiconducting transition-metal dichalcogenides. Our exciton Hamiltonian explicitly includes additional angular momentum associated with the pseudospin degree of freedom unavoidable in 2D semiconductingmaterials with honeycomb structure.We claim that this is the key ingredient for understanding the nonhydrogenic exciton spectra that was missing so far.

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ISO 690TRUSHIN, Maxim, Mark Oliver GOERBIG, Wolfgang BELZIG, 2016. Optical absorption by Dirac excitons in single-layer transition-metal dichalcogenides. In: Physical Review B. 2016, 94(4), 041301. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.94.041301
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@article{Trushin2016-07-07Optic-34781,
  year={2016},
  doi={10.1103/PhysRevB.94.041301},
  title={Optical absorption by Dirac excitons in single-layer transition-metal dichalcogenides},
  number={4},
  volume={94},
  issn={2469-9950},
  journal={Physical Review B},
  author={Trushin, Maxim and Goerbig, Mark Oliver and Belzig, Wolfgang},
  note={Article Number: 041301}
}
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