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Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C

Electron-phonon coupling, i.e., the scattering of lattice vibrations by electrons and vice versa, is ubiquitous in solids and can lead to emergent ground states such as superconductivity and charge-density wave order. A broad spectral phonon line shape is often interpreted as a marker of strong elec...

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Autores principales: Kurzhals, Philipp, Kremer, Geoffroy, Jaouen, Thomas, Nicholson, Christopher W., Heid, Rolf, Nagel, Peter, Castellan, John-Paul, Ivanov, Alexandre, Muntwiler, Matthias, Rumo, Maxime, Salzmann, Bjoern, Strocov, Vladimir N., Reznik, Dmitry, Monney, Claude, Weber, Frank
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752669/
https://www.ncbi.nlm.nih.gov/pubmed/35017477
http://dx.doi.org/10.1038/s41467-021-27843-y
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author Kurzhals, Philipp
Kremer, Geoffroy
Jaouen, Thomas
Nicholson, Christopher W.
Heid, Rolf
Nagel, Peter
Castellan, John-Paul
Ivanov, Alexandre
Muntwiler, Matthias
Rumo, Maxime
Salzmann, Bjoern
Strocov, Vladimir N.
Reznik, Dmitry
Monney, Claude
Weber, Frank
author_facet Kurzhals, Philipp
Kremer, Geoffroy
Jaouen, Thomas
Nicholson, Christopher W.
Heid, Rolf
Nagel, Peter
Castellan, John-Paul
Ivanov, Alexandre
Muntwiler, Matthias
Rumo, Maxime
Salzmann, Bjoern
Strocov, Vladimir N.
Reznik, Dmitry
Monney, Claude
Weber, Frank
author_sort Kurzhals, Philipp
collection PubMed
description Electron-phonon coupling, i.e., the scattering of lattice vibrations by electrons and vice versa, is ubiquitous in solids and can lead to emergent ground states such as superconductivity and charge-density wave order. A broad spectral phonon line shape is often interpreted as a marker of strong electron-phonon coupling associated with Fermi surface nesting, i.e., parallel sections of the Fermi surface connected by the phonon momentum. Alternatively broad phonons are known to arise from strong atomic lattice anharmonicity. Here, we show that strong phonon broadening can occur in the absence of both Fermi surface nesting and lattice anharmonicity, if electron-phonon coupling is strongly enhanced for specific values of electron-momentum, k. We use inelastic neutron scattering, soft x-ray angle-resolved photoemission spectroscopy measurements and ab-initio lattice dynamical and electronic band structure calculations to demonstrate this scenario in the highly anisotropic tetragonal electron-phonon superconductor YNi(2)B(2)C. This new scenario likely applies to a wide range of compounds.
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spelling pubmed-87526692022-01-20 Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C Kurzhals, Philipp Kremer, Geoffroy Jaouen, Thomas Nicholson, Christopher W. Heid, Rolf Nagel, Peter Castellan, John-Paul Ivanov, Alexandre Muntwiler, Matthias Rumo, Maxime Salzmann, Bjoern Strocov, Vladimir N. Reznik, Dmitry Monney, Claude Weber, Frank Nat Commun Article Electron-phonon coupling, i.e., the scattering of lattice vibrations by electrons and vice versa, is ubiquitous in solids and can lead to emergent ground states such as superconductivity and charge-density wave order. A broad spectral phonon line shape is often interpreted as a marker of strong electron-phonon coupling associated with Fermi surface nesting, i.e., parallel sections of the Fermi surface connected by the phonon momentum. Alternatively broad phonons are known to arise from strong atomic lattice anharmonicity. Here, we show that strong phonon broadening can occur in the absence of both Fermi surface nesting and lattice anharmonicity, if electron-phonon coupling is strongly enhanced for specific values of electron-momentum, k. We use inelastic neutron scattering, soft x-ray angle-resolved photoemission spectroscopy measurements and ab-initio lattice dynamical and electronic band structure calculations to demonstrate this scenario in the highly anisotropic tetragonal electron-phonon superconductor YNi(2)B(2)C. This new scenario likely applies to a wide range of compounds. Nature Publishing Group UK 2022-01-11 /pmc/articles/PMC8752669/ /pubmed/35017477 http://dx.doi.org/10.1038/s41467-021-27843-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Kurzhals, Philipp
Kremer, Geoffroy
Jaouen, Thomas
Nicholson, Christopher W.
Heid, Rolf
Nagel, Peter
Castellan, John-Paul
Ivanov, Alexandre
Muntwiler, Matthias
Rumo, Maxime
Salzmann, Bjoern
Strocov, Vladimir N.
Reznik, Dmitry
Monney, Claude
Weber, Frank
Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title_full Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title_fullStr Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title_full_unstemmed Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title_short Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi(2)B(2)C
title_sort electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in yni(2)b(2)c
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752669/
https://www.ncbi.nlm.nih.gov/pubmed/35017477
http://dx.doi.org/10.1038/s41467-021-27843-y
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