# Fermi-Surface-Sheet Dependent Electron-Phonon Coupling in a Borocarbide Superconductor                    <math display="inline">                      <mrow>                        <msub>                          <mrow>                            <mtext>YNi</mtext>                          </mrow>                          <mrow>                            <mn>2</mn>                          </mrow>                        </msub>                        <msub>                          <mrow>                            <mi>B</mi>                          </mrow>                          <mrow>                            <mn>2</mn>                          </mrow>                        </msub>                        <mi>C</mi>                      </mrow>                    </math>

https://mdr.nims.go.jp/datasets/557cb173-71b5-4341-91ed-872c5fae8ab2

## File

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## Id

557cb173-71b5-4341-91ed-872c5fae8ab2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-02T23:47:26.200050Z

## Updated at

2026-08-03T02:40:29.960750Z

## Published at

2026-08-03T05:30:23.893197Z

## Doi

https://doi.org/10.48505/nims.6436

## First published url

https://doi.org/10.1103/m6r6-vpdg

## Date published

2026-07-31

## Recorded date published

2026-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: |-
    Fermi-Surface-Sheet Dependent Electron-Phonon Coupling in a Borocarbide Superconductor
                        <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline">
                          <mml:mrow>
                            <mml:msub>
                              <mml:mrow>
                                <mml:mtext>YNi</mml:mtext>
                              </mml:mrow>
                              <mml:mrow>
                                <mml:mn>2</mml:mn>
                              </mml:mrow>
                            </mml:msub>
                            <mml:msub>
                              <mml:mrow>
                                <mml:mi mathvariant="normal">B</mml:mi>
                              </mml:mrow>
                              <mml:mrow>
                                <mml:mn>2</mml:mn>
                              </mml:mrow>
                            </mml:msub>
                            <mml:mi mathvariant="normal">C</mml:mi>
                          </mml:mrow>
                        </mml:math>
  title_type: original
  lang: en

## Description

- description: "We performed de Haas&ndash;van Alphen (dHvA) oscillation measurements
    and band-structure calculations for YNi<sub>2</sub>B<sub>2</sub>C. Our improved
    band structure successfully explained the origins of the large dHvA frequencies
    <i>&beta;</i> and <i>&zeta;</i>, which were inexplicable in previous works. By
    comparing experimental effective masses with band masses, we determined the electron&ndash;phonon
    coupling for each orbit. The results showed a clear Fermi-surface-sheet dependence
    of the electron&ndash;phonon coupling strength, especially highlighting that the
    coupling for the band-28 sheet is very weak, almost absent for the orbit with
    <i>B</i> &parallel; <i>c</i>. This finding is consistent with previous observations
    of dHvA oscillations from this orbit in the mixed state down to very low fields.
    Amid growing interest in high-temperature superconductivity driven by electron&ndash;phonon
    coupling in hydrides under high pressure, this Letter provides foundational data
    pivotal to precisely understanding electron&ndash;phonon coupling.\r\n"
  description_type: abstract
  lang: und

## Creator

- name: Taichi Terashima
  role: author
  orcid: https://orcid.org/0000-0001-9239-0621
- name: Hiroyuki Takeya
  role: author
  orcid: https://orcid.org/0000-0001-9445-4705
- name: Hisatomo Harima
  role: author
  orcid: https://orcid.org/0000-0003-1741-4368

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: electron-phonon coupling
  schema: not_defined
- subject: YNi2B2C
  schema: not_defined
- subject: de Haas-van Alphen effect
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Physical Review Letters
  issn: '00319007'
  volume: '137'
  issue: '5'
  article_number: '056003'

## Conference



## Related item



## Funding

- identifier: JP22K03537
  funder_name: Japan Society for the Promotion of Science
- identifier: JP24K00587
  funder_name: Japan Society for the Promotion of Science
- identifier: World Premier International Research Center Initiative
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



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## Computational method



## Energy level/transition state



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## Thumbnail

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filename: YNi2B2C_2025_v4p1.pdf