Table 2 Exciton-binding energies in bulk and monolayer.

From: Real- and momentum-space description of the excitons in bulk and monolayer chromium tri-halides

Excitons

ml-CrCl3

ml-CrBr3

ml-CrI3

bulk CrCl3

bulk CrBr3

bulk-CrI3

ex1

4.75,2.6238

3.85,2.0538, 2.337

1.95, 1.0638

3.35

2.5

1.0

ex2

3.9

3.1

1.35

2.5

1.75

0.4

ex3

2.3

2.05

0.9

1.1

0.9

0.1

  1. Exciton-binding energies Eb for three deepest lying excitons in all cases as computed from the difference between the one-particle electronic bandgap Eg and position of the exciton peaks Eex. We note the Eb values as reported from LDA-based single shot G0W0+BSE calculations for dielectric response performed by different groups. In the supplemental material, we discuss the possible reasons for their differences from our estimations.
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