科研之友
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摘要
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 Gruneisen parameter shows a similar dependence on the strain as reported for silicene (which is different from that of graphene).
- 出版日期2013-9-17
