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The magnetoelectric effect due to a semispherical capacitor surrounded by a spherical topologically insulating shell
Physica Scripta ( IF 2.9 ) Pub Date : 2020-08-04 , DOI: 10.1088/1402-4896/aba584
Daniel G Velázquez , L F Urrutia

We consider the magnetoelectric effect produced by a capacitor formed by two semispherical perfectly conducting plates subjected to a potential difference and surrounded by a spherical shell of a topologically insulating material. The modified Maxwell equations are solved in terms of coupled electric and magnetic scalar potentials using spherical coordinates and in the approximation where the effective magnetoelectric coupling is of the order of the fine structure constant. The emphasis is placed in the calculation of the magnetic field for several relevant configurations designed to enhance the possibility of measuring this field. The magnitudes we obtain fall within the sensitivities of magnetometers based upon nitrogen-vacancy centers in diamond as well as of devices using scanning SQUID magnetometry.

中文翻译:

由球形拓扑绝缘壳包围的半球形电容器引起的磁电效应

我们考虑由两个半球形完美导电板形成的电容器产生的磁电效应,该板受到电位差并被拓扑绝缘材料的球壳包围。修改后的麦克斯韦方程是根据耦合的电和磁标量势使用球坐标和在有效磁电耦合为精细结构常数数量级的近似中求解的。重点是计算几个相关配置的磁场,这些配置旨在增强测量该场的可能性。我们获得的幅度属于基于金刚石中氮空位中心的磁力计以及使用扫描 SQUID 磁力计的设备的灵敏度。
更新日期:2020-08-04
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