# Strong-coupling theory of bilayer plasmon excitations

https://mdr.nims.go.jp/datasets/0013807e-b287-4f54-a1ea-e500f9a11818

## File

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## Id

0013807e-b287-4f54-a1ea-e500f9a11818

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-01-19T02:23:08.931670Z

## Updated at

2026-01-19T04:01:20.208042Z

## Published at

2026-01-19T07:22:40.361798Z

## Doi

https://doi.org/10.48505/nims.6145

## First published url

https://doi.org/10.1103/c6qd-b9by

## Date published

2026-01-16

## Recorded date published

2026-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Strong-coupling theory of bilayer plasmon excitations
  title_type: original
  lang: en

## Description

- description: 'Recently plasmon excitations in bilayer lattice systems were studied
    extensively in the weak-coupling regime. Unlike single-layer systems, these bilayers
    exhibit two distinct modes, omega_{pm}, which show characteristic dependences
    upon the momentum and hopping integrals along the z direction. To apply them to
    cuprates, strong correlation effects should be considered, but a comprehensive
    analysis has not yet been investigated. In this work, we present a strong-coupling
    theory to analyze  the charge dynamics of a bilayer system, utilizing the t-J-V
    model,  which includes the long-range Coulomb interaction, V, on a lattice. Although
    our theoretical framework is fundamentally different from the weak-coupling approach,
    we find that resulting plasmon excitations are similar to those of a weak-coupling
    theory. A key distinction is that our strong-coupling framework reveals a  noticeable
    suppression of particle-hole excitations, which allows the plasmon modes to remain
    well-defined over a wider region of momentum. We suggest that the experimentally
    reported plasmon excitations in Y-based cuprates can be described by the omega_{-}
    mode, although we call for more systematic experiments to verify this. '
  description_type: abstract
  lang: und

## Creator

- name: Hiroyuki Yamase
  role: author
  orcid: https://orcid.org/0000-0003-0328-5657
- name: Luciano Zinni
  role: author
  orcid: https://orcid.org/0000-0002-9165-9251
- name: Matías Bejas
  role: author
  orcid: https://orcid.org/0000-0003-4254-0622
- name: Andrés Greco
  role: author
  orcid: https://orcid.org/0000-0001-5958-5080

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: bilayer systems
  schema: not_defined
- subject: t-J model
  schema: not_defined
- subject: cuprates
  schema: not_defined
- subject: high-temperature superconductors
  schema: not_defined
- subject: plasmons
  schema: not_defined
- subject: charge excitations
  schema: not_defined

## Rights

- description: "©2026 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

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## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '113'
  issue: '4'
  article_number: '045129'

## Conference



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## Funding

- funder_name: Ministry of Education, Culture, Sports, Science and Technology
  description: WPI

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## Fileset

- id: c2eb631a-2181-40ff-9cbc-0b7287878540
  filename: main.pdf
  content_type: application/pdf
  size: 4897036
  md5: 1937eaddbef456e7de69edbc424c000f

## Thumbnail

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