Table 1 Lattice parameters and bond lengths of crystal structures optimized using GGA-PBE and vdW-DF methods (see Fig. 1(a) for the atomic labels)

From: Engineering Topological Surface States and Giant Rashba Spin Splitting in BiTeI/Bi2Te3 Heterostructures

   

Bond length (Ã…)

 

a (Ã…)

c (Ã…)

Bi1-I

I-Te1

Te1-Bi2

GGA-PBE

4.431

18.555

3.291

4.595

3.082

vdW-DF

4.431

16.921

3.295

3.850

3.083

 

Bi2-Te2

Te2-Bi3

Bi3-Te3

Te3-Te4

Te4-Bi1

GGA-PBE

3.292

3.278

3.087

4.249

3.075

vdW-DF

3.280

3.254

3.094

3.746

3.076