Tension-induced mechanical properties of stanene
Artikel i vetenskaplig tidskrift, 2016

In this paper, elastic properties of stanene under equiaxial or uniaxial tensions along armchair and zigzag directions are investigated by first-principles calculations. The stress strain relation is calculated and the relaxation of the internal atom positions is analyzed. The high-order elastic constants are calculated by fitting the polynomial expressions. The Young's modulus and Poisson ratio of the stanene is calculated to be 24.14 N/m and 0.39 N/m, respectively. The stanene exhibits lower Young's modulus than those of the proceeding group IV elements, which is attributed to the smaller sp(2)-sp(3) bond energy in stanene than those of silicene and germanene. Calculated values of ultimate stresses and strains, second-order elastic constants (SOCEs) and the in-plane Young's modulus are all positive. It proves that stanene is mechanically stable.

bond length evolution

stress strain responses

Stanene

Författare

L. L. Tao

Beijing University of Posts and Telecommunications (BUPT)

C. H. Yang

Shanxi University of Technology (SNUT)

L. Wu

Beijing University of Posts and Telecommunications (BUPT)

L. H. Han

Beijing University of Posts and Telecommunications (BUPT)

Y. X. Song

Chinese Academy of Sciences

Shu Min Wang

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

P. F. Lu

Beijing University of Posts and Telecommunications (BUPT)

Modern Physics Letters B

0217-9849 (ISSN)

Vol. 30 Art. no. 1650146-

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1142/s0217984916501463