Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe

Abstract Topological Dirac semimetals with accidental band touching between conduction and valence bands protected by time reversal and inversion symmetry are at the frontier of modern condensed matter research. A majority of discovered topological semimetals are nonmagnetic and conserve time revers...

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Autores principales:	M. Mofazzel Hosen, Gyanendra Dhakal, Klauss Dimitri, Pablo Maldonado, Alex Aperis, Firoza Kabir, Christopher Sims, Peter Riseborough, Peter M. Oppeneer, Dariusz Kaczorowski, Tomasz Durakiewicz, Madhab Neupane
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5790b43b313941c98e4087e05db1f58b
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spelling	oai:doaj.org-article:5790b43b313941c98e4087e05db1f58b2021-12-02T15:07:50ZDiscovery of topological nodal-line fermionic phase in a magnetic material GdSbTe10.1038/s41598-018-31296-72045-2322https://doaj.org/article/5790b43b313941c98e4087e05db1f58b2018-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-31296-7https://doaj.org/toc/2045-2322Abstract Topological Dirac semimetals with accidental band touching between conduction and valence bands protected by time reversal and inversion symmetry are at the frontier of modern condensed matter research. A majority of discovered topological semimetals are nonmagnetic and conserve time reversal symmetry. Here we report the experimental discovery of an antiferromagnetic topological nodal-line semimetallic state in GdSbTe using angle-resolved photoemission spectroscopy. Our systematic study reveals the detailed electronic structure of the paramagnetic state of antiferromagnetic GdSbTe. We observe the presence of multiple Fermi surface pockets including a diamond-shape, and small circular pockets around the zone center and high symmetry X points of the Brillouin zone (BZ), respectively. Furthermore, we observe the presence of a Dirac-like state at the X point of the BZ and the effect of magnetism along the nodal-line direction. Interestingly, our experimental data show a robust Dirac-like state both below and above the magnetic transition temperature (T N = 13 K). Having a relatively high transition temperature, GdSbTe provides an archetypical platform to study the interaction between magnetism and topological states of matter.M. Mofazzel HosenGyanendra DhakalKlauss DimitriPablo MaldonadoAlex AperisFiroza KabirChristopher SimsPeter RiseboroughPeter M. OppeneerDariusz KaczorowskiTomasz DurakiewiczMadhab NeupaneNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Mofazzel Hosen Gyanendra Dhakal Klauss Dimitri Pablo Maldonado Alex Aperis Firoza Kabir Christopher Sims Peter Riseborough Peter M. Oppeneer Dariusz Kaczorowski Tomasz Durakiewicz Madhab Neupane Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
description	Abstract Topological Dirac semimetals with accidental band touching between conduction and valence bands protected by time reversal and inversion symmetry are at the frontier of modern condensed matter research. A majority of discovered topological semimetals are nonmagnetic and conserve time reversal symmetry. Here we report the experimental discovery of an antiferromagnetic topological nodal-line semimetallic state in GdSbTe using angle-resolved photoemission spectroscopy. Our systematic study reveals the detailed electronic structure of the paramagnetic state of antiferromagnetic GdSbTe. We observe the presence of multiple Fermi surface pockets including a diamond-shape, and small circular pockets around the zone center and high symmetry X points of the Brillouin zone (BZ), respectively. Furthermore, we observe the presence of a Dirac-like state at the X point of the BZ and the effect of magnetism along the nodal-line direction. Interestingly, our experimental data show a robust Dirac-like state both below and above the magnetic transition temperature (T N = 13 K). Having a relatively high transition temperature, GdSbTe provides an archetypical platform to study the interaction between magnetism and topological states of matter.
format	article
author	M. Mofazzel Hosen Gyanendra Dhakal Klauss Dimitri Pablo Maldonado Alex Aperis Firoza Kabir Christopher Sims Peter Riseborough Peter M. Oppeneer Dariusz Kaczorowski Tomasz Durakiewicz Madhab Neupane
author_facet	M. Mofazzel Hosen Gyanendra Dhakal Klauss Dimitri Pablo Maldonado Alex Aperis Firoza Kabir Christopher Sims Peter Riseborough Peter M. Oppeneer Dariusz Kaczorowski Tomasz Durakiewicz Madhab Neupane
author_sort	M. Mofazzel Hosen
title	Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
title_short	Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
title_full	Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
title_fullStr	Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
title_full_unstemmed	Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
title_sort	discovery of topological nodal-line fermionic phase in a magnetic material gdsbte
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/5790b43b313941c98e4087e05db1f58b
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Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe

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