Stability of germanene under tensile strain

Abstract
The stability of germanene under biaxial tensile strain and the accompanying modifications of the electronic properties are studied by density functional theory. The phonon spectrum shows that up to 16% strain the germanene lattice is stable, where the Dirac cone shifts towards higher energy and hole-doped Dirac states are achieved. The latter is due to weakening of the Ge-Ge bonds and reduction of the s-p hybridization. Our calculated Grüneisen parameter shows a similar dependence on the strain as reported for silicene (which is different from that of graphene). © 2013 Elsevier B.V. All rights reserved.

Citation
Kaloni, T. P., & Schwingenschlögl, U. (2013). Stability of germanene under tensile strain. Chemical Physics Letters, 583, 137–140. doi:10.1016/j.cplett.2013.08.001

Publisher
Elsevier BV

Journal
Chemical Physics Letters

DOI
10.1016/j.cplett.2013.08.001

arXiv
1311.2807

Additional Links
http://arxiv.org/abs/arXiv:1311.2807v1

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