Difficulties in operator-based formulation of the bulk quadrupole moment
Difficulties in operator-based formulation of the bulk quadrupole moment
复制标题
DOI：
10.1103/physrevb.100.245133
复制
发表时间：
2019-02
影响因子：
3.7
通讯作者：
Seishiro Ono;Luka Trifunovic;Haruki Watanabe
中科院分区：
文献类型：
--
作者：
Seishiro Ono;Luka Trifunovic;Haruki Watanabe
电多极矩是绝缘材料最基本的性质。然而，整体多极子的一般公式一直是一个长期存在的问题。几十年前，金-史密斯、范德比尔特和雷斯塔提出了电偶极矩的解决方案。最近，有人试图将Resta公式推广到高阶多极子。在这项工作中，我们指出了最近提案中的几个问题。
The electric multipole moments are the most fundamental properties of insulating materials. However, the general formulation of bulk multipoles has been a long standing problem. The solution for the electric dipole moment was provided decades ago by King-Smith, Vanderbilt, and Resta. Recently, there have been attempts of generalizing Resta's formula to higher-order multipoles. In this work, we point out several issues in the recent proposals.