In this work, we are studying thermodynamics properties and optical absorption of bipolaron in graphene under a laser field using the variational method. We obtain the ground and first excited states of the bipolaron which strongly depend on laser parameter and graphene characteristics. It is seen that the optical absorption of a bipolaron in graphene depends strongly on the laser parameter. We observed that laser reduces the absorption of photons by laser. The latter also reinforces the electron–electron bound state in graphene leading to its strong energy storage capabilities. Our results show that the electron–electron interaction and laser parameters are important to control the disorder of the system. Due to its intensity and frequency, laser contribution is highest on the entropy, internal energy and specific heat, while the contribution of phonon modes is minimum on these thermodynamics properties suggesting the importance of laser on graphene structures. The results obtained are efficient because bipolaron is well formed and stable in graphene. This investigation may enlighten the understanding of the charge transport mechanism in graphene nanomaterials.

在这项工作中，我们正在研究使用变分法在激光场下双极化子在石墨烯中的热力学性质和光吸收。我们获得了双极化子的基态和第一激发态，这在很大程度上取决于激光参数和石墨烯的特性。可以看出，双极化子在石墨烯中的光吸收在很大程度上取决于激光参数。我们观察到激光减少了激光对光子的吸收。后者还增强了石墨烯中的电子-电子结合态，从而具有强大的储能能力。我们的结果表明，电子-电子相互作用和激光参数对于控制系统的无序性很重要。由于其强度和频率，激光在熵，内能和比热方面的贡献最高，而声子模式对这些热力学性质的贡献最小，这表明激光对石墨烯结构的重要性。获得的结果是有效的，因为双极化子形成良好且在石墨烯中稳定。这项研究可能会启发人们对石墨烯纳米材料中电荷传输机制的理解。