标题： 石墨烯中由快离子引起的库仑杂质 显示英文标题

标题： Coulomb impurities in graphene driven by fast ions

摘要： 我们为石墨烯单层中的二维(2D)人工原子中的电子跃迁提供了一个理论模型。 人工原子是由于该层中存在一个带电的吸附原子（库仑杂质）而产生的，并与平行于该层运动的高速超相对论离子相互作用。 我们通过求解描述平面原子与超相对论粒子电磁场相互作用的时间依赖二维狄拉克方程的精确解，计算了相应电子跃迁的概率和截面。 显示英文摘要

摘要： We provide a theoretical model for electronic transitions in a two-dimensional (2D) artificial atom in a graphene monolayer. The artificial atom is due to the presence of a charged adatom (Coulomb impurity) in the layer and interacts with a fast ultrarelativistic ion moving parallel to the layer. We compute the probability and cross sections for the corresponding electronic transitions by means of an exact solution of the time-dependent 2D Dirac equation describing the interaction of the planar atom with the electromagnetic field of the ultrarelativistic projectile.