Data for "On the applicability of the cumulant expansion method for the calculation of transport properties in electron-phonon systems"

These are the numerical data supporting the paper titled "On the applicability of the cumulant expansion method for the calculation of transport properties in electron-phonon systems" (arXiv:2512.14900). A detailed description of the dataset is provided in the README file.本数据集为论文《论累积展开法（cumulant expansion method）在电子-声子系统输运性质计算中的适用性》（arXiv:2512.14900）提供数值支撑。数据集的详细说明详见README文件。