A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Abstract There is tremendous interest in measuring the strong electron–phonon interactions seen in topological Weyl semimetals. The semimetal NbIrTe4 has been proposed to be a Type-II Weyl semimetal with 8 pairs of opposite Chirality Weyl nodes which are very close to the Fermi energy. We show using...

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Autores principales:	Iraj Abbasian Shojaei, Seyyedesadaf Pournia, Congcong Le, Brenden R. Ortiz, Giriraj Jnawali, Fu-Chun Zhang, Stephen D. Wilson, Howard E. Jackson, Leigh M. Smith
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/703325b01c5a4519a49ae5e629823cee
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spelling	oai:doaj.org-article:703325b01c5a4519a49ae5e629823cee2021-12-02T14:27:59ZA Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe410.1038/s41598-021-87302-y2045-2322https://doaj.org/article/703325b01c5a4519a49ae5e629823cee2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87302-yhttps://doaj.org/toc/2045-2322Abstract There is tremendous interest in measuring the strong electron–phonon interactions seen in topological Weyl semimetals. The semimetal NbIrTe4 has been proposed to be a Type-II Weyl semimetal with 8 pairs of opposite Chirality Weyl nodes which are very close to the Fermi energy. We show using polarized angular-resolved micro-Raman scattering at two excitation energies that we can extract the phonon mode dependence of the Raman tensor elements from the shape of the scattering efficiency versus angle. This van der Waals semimetal with broken inversion symmetry and 24 atoms per unit cell has 69 possible phonon modes of which we measure 19 modes with frequencies and symmetries consistent with Density Functional Theory calculations. We show that these tensor elements vary substantially in a small energy range which reflects a strong variation of the electron–phonon coupling for these modes.Iraj Abbasian ShojaeiSeyyedesadaf PourniaCongcong LeBrenden R. OrtizGiriraj JnawaliFu-Chun ZhangStephen D. WilsonHoward E. JacksonLeigh M. SmithNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Iraj Abbasian Shojaei Seyyedesadaf Pournia Congcong Le Brenden R. Ortiz Giriraj Jnawali Fu-Chun Zhang Stephen D. Wilson Howard E. Jackson Leigh M. Smith A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
description	Abstract There is tremendous interest in measuring the strong electron–phonon interactions seen in topological Weyl semimetals. The semimetal NbIrTe4 has been proposed to be a Type-II Weyl semimetal with 8 pairs of opposite Chirality Weyl nodes which are very close to the Fermi energy. We show using polarized angular-resolved micro-Raman scattering at two excitation energies that we can extract the phonon mode dependence of the Raman tensor elements from the shape of the scattering efficiency versus angle. This van der Waals semimetal with broken inversion symmetry and 24 atoms per unit cell has 69 possible phonon modes of which we measure 19 modes with frequencies and symmetries consistent with Density Functional Theory calculations. We show that these tensor elements vary substantially in a small energy range which reflects a strong variation of the electron–phonon coupling for these modes.
format	article
author	Iraj Abbasian Shojaei Seyyedesadaf Pournia Congcong Le Brenden R. Ortiz Giriraj Jnawali Fu-Chun Zhang Stephen D. Wilson Howard E. Jackson Leigh M. Smith
author_facet	Iraj Abbasian Shojaei Seyyedesadaf Pournia Congcong Le Brenden R. Ortiz Giriraj Jnawali Fu-Chun Zhang Stephen D. Wilson Howard E. Jackson Leigh M. Smith
author_sort	Iraj Abbasian Shojaei
title	A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
title_short	A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
title_full	A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
title_fullStr	A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
title_full_unstemmed	A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4
title_sort	raman probe of phonons and electron–phonon interactions in the weyl semimetal nbirte4
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/703325b01c5a4519a49ae5e629823cee
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A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

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