Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy

Abstract ReSe2 and ReS2 are unusual compounds amongst the layered transition metal dichalcogenides as a result of their low symmetry, with a characteristic in-plane anisotropy due to in-plane rhenium ‘chains’. They preserve inversion symmetry independent of the number of layers and, in contrast to m...

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Autores principales:	Lewis S. Hart, James L. Webb, Sara Dale, Simon J. Bending, Marcin Mucha-Kruczynski, Daniel Wolverson, Chaoyu Chen, José Avila, Maria C. Asensio
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e18b098eef0b4b4a8cb6aaf697d283f2
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spelling	oai:doaj.org-article:e18b098eef0b4b4a8cb6aaf697d283f22021-12-02T12:30:51ZElectronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy10.1038/s41598-017-05361-62045-2322https://doaj.org/article/e18b098eef0b4b4a8cb6aaf697d283f22017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05361-6https://doaj.org/toc/2045-2322Abstract ReSe2 and ReS2 are unusual compounds amongst the layered transition metal dichalcogenides as a result of their low symmetry, with a characteristic in-plane anisotropy due to in-plane rhenium ‘chains’. They preserve inversion symmetry independent of the number of layers and, in contrast to more well-known transition metal dichalcogenides, bulk and few-monolayer Re-TMD compounds have been proposed to behave as electronically and vibrational decoupled layers. Here, we probe for the first time the electronic band structure of bulk ReSe2 by direct nanoscale angle-resolved photoemission spectroscopy. We find a highly anisotropic in- and out-of-plane electronic structure, with the valence band maxima located away from any particular high-symmetry direction. The effective mass doubles its value perpendicular to the Re chains and the interlayer van der Waals coupling generates significant electronic dispersion normal to the layers. Our density functional theory calculations, including spin-orbit effects, are in excellent agreement with these experimental findings.Lewis S. HartJames L. WebbSara DaleSimon J. BendingMarcin Mucha-KruczynskiDaniel WolversonChaoyu ChenJosé AvilaMaria C. AsensioNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lewis S. Hart James L. Webb Sara Dale Simon J. Bending Marcin Mucha-Kruczynski Daniel Wolverson Chaoyu Chen José Avila Maria C. Asensio Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
description	Abstract ReSe2 and ReS2 are unusual compounds amongst the layered transition metal dichalcogenides as a result of their low symmetry, with a characteristic in-plane anisotropy due to in-plane rhenium ‘chains’. They preserve inversion symmetry independent of the number of layers and, in contrast to more well-known transition metal dichalcogenides, bulk and few-monolayer Re-TMD compounds have been proposed to behave as electronically and vibrational decoupled layers. Here, we probe for the first time the electronic band structure of bulk ReSe2 by direct nanoscale angle-resolved photoemission spectroscopy. We find a highly anisotropic in- and out-of-plane electronic structure, with the valence band maxima located away from any particular high-symmetry direction. The effective mass doubles its value perpendicular to the Re chains and the interlayer van der Waals coupling generates significant electronic dispersion normal to the layers. Our density functional theory calculations, including spin-orbit effects, are in excellent agreement with these experimental findings.
format	article
author	Lewis S. Hart James L. Webb Sara Dale Simon J. Bending Marcin Mucha-Kruczynski Daniel Wolverson Chaoyu Chen José Avila Maria C. Asensio
author_facet	Lewis S. Hart James L. Webb Sara Dale Simon J. Bending Marcin Mucha-Kruczynski Daniel Wolverson Chaoyu Chen José Avila Maria C. Asensio
author_sort	Lewis S. Hart
title	Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
title_short	Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
title_full	Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
title_fullStr	Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
title_full_unstemmed	Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy
title_sort	electronic bandstructure and van der waals coupling of rese2 revealed by high-resolution angle-resolved photoemission spectroscopy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e18b098eef0b4b4a8cb6aaf697d283f2
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Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopy

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