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Dynamical gap generation in graphene with frequency-dependent renormalization effects

机译:石墨烯中动态间隙的产生具有频率相关的归一化效应

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摘要

We study the frequency dependencies in the renormalization of the fermion Green's function for the 7r-band electrons in graphene and their influence on the dynamical gap generation at sufficiently strong interaction. Adopting the effective QED-like description for the low-energy excitations within the Dirac-cone region, we self-consistently solve the fermion Dyson-Schwinger equation in various approximations for the photon propagator and the vertex function with special emphasis on frequency-dependent Lindhard screening and retardation effects.
机译:我们研究了石墨烯中7r带电子对费米子格林函数的重新归一化的频率依赖性及其在足够强的相互作用下对动态间隙产生的影响。对于狄拉克锥区域内的低能激发,采用有效的类似于QED的描述,我们以一致的方式自洽地求解了费米子戴森-舒温格方程的光子传播子和顶点函数,并特别强调了与频率相关的Lindhard筛选和延迟效应。

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  • 来源
    《Physical review. B, Condensed Matter And Materals Physics》 |2016年第12期|125102.1-125102.9|共9页
  • 作者单位

    Department of Physics, Brandon University, Brandon, Manitoba, Canada R7A 6A9 ,Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba;

    Institut fuer Theoretische Physik, Justus-Liebig-Universitaet Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany;

    Institut fuer Theoretische Physik, Justus-Liebig-Universitaet Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany;

    Ⅰ. Physikalisches Institut, Justus-Liebig-Universitaet Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany;

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