我们介绍了使用GW扰动理论(GW PT)的电子波(E -PH)耦合的实际计算的工作流程。此工作流程结合了BerkeleyGW,ABINIT和EPW软件包,以在GW自我水平上启用精确的E-PH计算,超出了基于密度功能理论(DFT)和密度功能 - 功能扰动理论(DFPT)的标准计算。This workflow begins with DFT and DFPT calculations ( ABINIT ) as starting point, followed by GW and GW PT calculations ( BerkeleyGW ) for the quasiparticle band structures and e -ph matrix elements on coarse electron k - and phonon q -grids, which are then interpolated to finer grids through Wannier interpolation ( EPW ) for computations of various e -ph coupling determined physical诸如各向异性Eliashberg方程的电子自我甲基元或解决方案等数量。开发了一种量规的对称性展开技术,以降低GW PT(以及DFPT)的计算成本,同时满足Wannier插值的规格一致性要求。
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