Quantum plasmonic nonreciprocity in parity-violating magnets
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,...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164684 |
| _version_ | 1824454028623347712 |
|---|---|
| author | Arora, Arpit Rudner, Mark S. Song, Justin Chien Wen |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Arora, Arpit Rudner, Mark S. Song, Justin Chien Wen |
| author_sort | Arora, Arpit |
| collection | NTU |
| description | 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. |
| first_indexed | 2025-02-19T03:15:48Z |
| format | Journal Article |
| id | ntu-10356/164684 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:15:48Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1646842023-11-06T15:35:45Z Quantum plasmonic nonreciprocity in parity-violating magnets Arora, Arpit Rudner, Mark S. Song, Justin Chien Wen School of Physical and Mathematical Sciences Science::Physics Nonreciprocal Plasmons Bulk Directional Currents 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. Ministry of Education (MOE) Nanyang Technological University Submitted/Accepted version This work was supported by Singapore MOE Academic Research Fund Tier 3 Grant MOE2018-T3-1-002 and a Nanyang Technological University start-up grant (NTUSUG). 2023-02-08T08:51:07Z 2023-02-08T08:51:07Z 2022 Journal Article Arora, A., Rudner, M. S. & Song, J. C. W. (2022). Quantum plasmonic nonreciprocity in parity-violating magnets. Nano Letters, 22(23), 9351-9357. https://dx.doi.org/10.1021/acs.nanolett.2c03126 1530-6984 https://hdl.handle.net/10356/164684 10.1021/acs.nanolett.2c03126 36383645 2-s2.0-85142609712 23 22 9351 9357 en MOE2018-T3-1-002 NTU-SUG Nano Letters © 2022 American Chemical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1021/acs.nanolett.2c03126. application/pdf |
| spellingShingle | Science::Physics Nonreciprocal Plasmons Bulk Directional Currents Arora, Arpit Rudner, Mark S. Song, Justin Chien Wen Quantum plasmonic nonreciprocity in parity-violating magnets |
| title | Quantum plasmonic nonreciprocity in parity-violating magnets |
| title_full | Quantum plasmonic nonreciprocity in parity-violating magnets |
| title_fullStr | Quantum plasmonic nonreciprocity in parity-violating magnets |
| title_full_unstemmed | Quantum plasmonic nonreciprocity in parity-violating magnets |
| title_short | Quantum plasmonic nonreciprocity in parity-violating magnets |
| title_sort | quantum plasmonic nonreciprocity in parity violating magnets |
| topic | Science::Physics Nonreciprocal Plasmons Bulk Directional Currents |
| url | https://hdl.handle.net/10356/164684 |
| work_keys_str_mv | AT aroraarpit quantumplasmonicnonreciprocityinparityviolatingmagnets AT rudnermarks quantumplasmonicnonreciprocityinparityviolatingmagnets AT songjustinchienwen quantumplasmonicnonreciprocityinparityviolatingmagnets |