论文标题
非中心对称磁系统中的固有非肾脏散装等离子体
Intrinsic nonreciprocal bulk plasmons in noncentrosymmetric magnetic systems
论文作者
论文摘要
非肾脏等离子间可以在纳米级的单向光传播，这是光子应用的必不可少的基础。在这里，我们探讨了基于潜在的对称性的散装等离子体传播中的固有非转换性。我们证明，根据带有倒置断裂和时间反转对称性的系统的波形的迹象，频带以及内部的散装等离子体模式都遵循不对称的分散体。我们表明，带等离子体室分散体中的非交流性是由量子度量连接决定的，量子指标连接是带状几何数量。块状内等离子体色散中的固有非交流性由量子公制偶极子和高阶“ drude”重量术语决定。我们通过二维Qi-wu-zhang模型的显式数值计算来证实我们的发现，并证明了在扭曲的双层石墨烯等Moire系统中存在固有的非互联体内和频带等离子模式的固有非偏置和频带等离子模式。
Nonreciprocal plasmonics enables one-way light propagation at the nanoscale and it is an essential building block for photonics applications. Here, we explore intrinsic nonreciprocity in bulk plasmon propagation based on underlying symmetries. We demonstrate that the interband, as well as the intraband bulk plasmon modes, follow asymmetric dispersion depending on the sign of the wavevector for systems with broken inversion and time-reversal symmetry. We show that the nonreciprocity in the interband plasmon dispersion is dictated by the quantum metric connection, which is a band geometric quantity. The intrinsic nonreciprocity in bulk intraband plasmon dispersion is dictated by the quantum metric dipole and a higher-order `Drude' weight-like term. We corroborate our findings via explicit numerical calculations for the two-dimensional Qi-Wu-Zhang model and demonstrate the existence of intrinsic nonreciprocal intraband and interband plasmon modes in moire systems such as twisted bilayer graphene.
