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Discovery of topolo...
Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe
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Hosen, M. Mofazzel (author)
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Dhakal, Gyanendra (author)
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Dimitri, Klauss (author)
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- Maldonado, Pablo (author)
- Uppsala universitet,Materialteori
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- Aperis, Alex (author)
- Uppsala universitet,Materialteori
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Kabir, Firoza (author)
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Sims, Christopher (author)
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Riseborough, Peter (author)
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- Oppeneer, Peter M. (author)
- Uppsala universitet,Materialteori
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Kaczorowski, Dariusz (author)
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Durakiewicz, Tomasz (author)
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Neupane, Madhab (author)
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(creator_code:org_t)
- 2018-09-05
- 2018
- English.
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In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 8
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Abstract
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- 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 (TN = 13 K). Having a relatively high transition temperature, GdSbTe provides an archetypical platform to study the interaction between magnetism and topological states of matter.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- ref (subject category)
- art (subject category)
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- By the author/editor
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Hosen, M. Mofazz ...
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Dhakal, Gyanendr ...
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Dimitri, Klauss
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Maldonado, Pablo
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Aperis, Alex
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Kabir, Firoza
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show more...
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Sims, Christophe ...
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Riseborough, Pet ...
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Oppeneer, Peter ...
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Kaczorowski, Dar ...
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Durakiewicz, Tom ...
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Neupane, Madhab
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Scientific Repor ...
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Uppsala University