Table 1 Lattice parameters for halogenated arsenene.

From: Quantum spin Hall insulator in halogenated arsenene films with sizable energy gaps

Structure

a(Å)

dAs-As(Å)

dAs-X(Å)

h(Å)

Ef(eV)

Eg(eV)

Z2

F-arsenene

4.57

2.64

1.81

0.108

−2.364

0.194

1

Cl-arsenene

4.63

2.67

2.22

0.050

−0.783

0.232

1

Br-arsenene

4.64

2.68

2.38

0.073

−0.568

0.240

1

I-arsenene

4.68

2.70

2.59

0.139

−0.265

0.255

1

  1. The a, dAs-As, dAs-X, h, Ef, Eg and Z2 stand for the lattice constant, As-As bond length, As-X bond length (X = F, Cl, Br and I), buckling height, formation energy, SOC-induced energy gap and topological invariant.
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