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,...

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Main Authors: Arora, Arpit, Rudner, Mark S., Song, Justin Chien Wen
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/164684
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Nonreciprocal Plasmons
Bulk Directional Currents
spellingShingle Science::Physics
Nonreciprocal Plasmons
Bulk Directional Currents
Arora, Arpit
Rudner, Mark S.
Song, Justin Chien Wen
Quantum plasmonic nonreciprocity in parity-violating magnets
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.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Arora, Arpit
Rudner, Mark S.
Song, Justin Chien Wen
format Article
author Arora, Arpit
Rudner, Mark S.
Song, Justin Chien Wen
author_sort Arora, Arpit
title Quantum plasmonic nonreciprocity in parity-violating magnets
title_short 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_sort quantum plasmonic nonreciprocity in parity-violating magnets
publishDate 2023
url https://hdl.handle.net/10356/164684
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