We study the effect of anisotropy (strain) on dynamical gap generation in graphene. We work with a low energy effective theory obtained from a tight-binding Hamiltonian expanded around the Dirac points in momentum space. We use a nonperturbative Schwinger-Dyson approach and calculate a coupled set of five momentum dependent dressing functions. Our results show that the critical coupling depends only weakly on the anisotropy parameter, and increases with greater anisotropy.

中文翻译：

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各向异性对石墨烯相变的影响

我们研究了各向异性（应变）对石墨烯中动态间隙生成的影响。我们使用低能量有效理论，该理论从围绕动量空间的狄拉克点扩展的紧束缚哈密顿量获得。我们使用非扰动的Schwinger-Dyson方法，并计算了五个动量依赖的修整函数的耦合集合。我们的结果表明，临界耦合仅微弱地依赖于各向异性参数，并且随着各向异性的增大而增加。