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Tension-induced mechanical properties of stanene

L. L. Tao ; C. H. Yang ; L. Y. Wu ; L. H. Han ; Y. X. Song ; Shumin Wang (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; P. F. Lu
Modern physics letters B (0217-9849). Vol. 30 (2016), 12, p. Art. no. 1650146.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Stanene, bond length evolution, stress strain responses

Denna post skapades 2016-07-06. Senast ändrad 2016-07-07.
CPL Pubid: 239059


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Fotonik


Den kondenserade materiens fysik

Chalmers infrastruktur