Quantum Plasmonic Nonreciprocity in Parity-Violating Magnets,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Quantum Plasmonic Nonreciprocity in Parity-Violating Magnets
Nano Letters ( IF 9.6 ) Pub Date : 2022-11-16 , DOI: 10.1021/acs.nanolett.2c03126
Arpit Arora ₁ , Mark S Rudner ₂ , Justin C W Song ₁

Affiliation

The optical responses of metals are often dominated by plasmonic resonances, that is, the collective oscillations of interacting electron liquids. Here we unveil a new class of plasmons─quantum metric plasmons (QMPs)─that arise in a wide range of parity-violating magnetic metals. In these materials, a dipolar distribution of the quantum metric (a fundamental characteristic of Bloch wave functions) produces intrinsic nonreciprocal bulk plasmons. Strikingly, QMP nonreciprocity manifests even when the single-particle dispersion is symmetric: QMPs are sensitive to time-reversal and parity violations hidden in the Bloch wave function. In materials with asymmetric single-particle dispersions, quantum metric dipole induced nonreciprocity can continue to dominate at large frequencies. We anticipate that QMPs can be realized in a wide range of parity-violating magnets, including twisted bilayer graphene heterostructures, where quantum geometric quantities can achieve large values.

中文翻译：

违反宇称的磁体中的量子等离子体非互易性

金属的光学响应通常由等离子体共振主导，即相互作用的电子液体的集体振荡。在这里，我们揭示了一类新的等离激元——量子度量等离激元 (QMP)——出现在各种违反奇偶校验的磁性金属中。在这些材料中，量子度量的偶极分布（布洛赫波函数的一个基本特征）产生本征非互易体等离子体。引人注目的是，即使单粒子色散是对称的，QMP 的非互易性也会表现出来：QMP 对隐藏在布洛赫波函数中的时间反演和奇偶校验违规很敏感。在具有不对称单粒子分散的材料中，量子度量偶极子引起的非互易性可以继续在高频率下占主导地位。

更新日期：2022-11-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11