Difficulties in operator-based formulation of the bulk quadrupole moment

Article

关键词: MECHANICAL POSITION-OPERATOR;    ELECTRIC POLARIZATION;    LOCALIZATION;   

DOI  :  10.1103/PhysRevB.100.245133

来源: SCIE

【 摘 要 】

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 at generalizing Resta's formula to higher-order multipoles. We point out several issues in the recent proposals.

【 授权许可】

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