Table 2 Intrinsic properties of monolayer stanane, including GW0 band gap at Γ (E g ), first absorption peak (E f.p ), binding energy of tight binding exciton (E tb ), maximum intensity of the absorption peak (E m.p ) and the redshift of E m.p (ΔE m.p ) under 0% and 2% strain with and without SOC.

From: Quasiparticle and optical properties of strained stanene and stanane

Strain

SOC

GW0 E g (eV)

BSE E f.p (eV)

E tb (eV)

RPA E m.p (eV)

BSE E m.p (eV)

ΔE m.p (eV)

0%

without

2.05

1.75

0.30

4.19

3.48

0.71

with

1.63

1.54

0.09

4.11

3.50

0.61

2%

without

1.64

1.36

0.28

4.02

3.28

0.74

with

1.22

1.12

0.10

3.96

3.26

0.70