周期晶格的静电势
The electrostatic potential of a periodic lattice
摘要：
利用笛卡尔多极子方法计算了任意扩展电荷周期晶格的静电势。这种方法允许从接触电位（源极上的电位）中分离长程电位。我们把静电势和相互作用能都写成倒易空间中的收敛和。
英文摘要：
We calculate the electrostatic potential of a periodic lattice of arbitrary extended charges by using the Cartesian multipole formalism. This method allows the separation of the long-range potential from the contact potential (potential on the source). We write both the electrostatic potential and the interaction energy as convergent sums in the reciprocal space.
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