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Abstract
We explore the topological electronic band structure of the pyrochlore lattice in the strong spin-orbit coupling regime. Using angle-resolved photoemission spectroscopy, first-principles calculations, and symmetry analysis, we have investigated the bulk electronic structure of RbBi2, which has a Bi pyrochlore network. We observe the presence of 3D massless Dirac fermions enforced by nonsymmorphic symmetry, as well as a 3D quadratic band crossing protected by cubic crystalline symmetry. Furthermore, we identify an additional 3D linear Dirac dispersion associated with band inversion protected by threefold rotation symmetry. These observations reveal the rich band topology of itinerant pyrochlore lattice systems in the strong SOC limit and serve as a starting point to explore correlated topological phases in geometrically frustrated lattices.
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Authors (14)
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Dongjin Oh
- Massachusetts Institute of Technology
-
Junha Kang
- Seoul National University
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Yuting Qian
- Seoul National University
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Shiang Fang
- Massachusetts Institute of Technology
-
Mingu Kang
- Massachusetts Institute of Technology
-
Chris Jozwiak
- Lawrence Berkeley National Laboratory
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Aaron Bostwick
- Lawrence Berkeley National Laboratory
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Eli Rotenberg
- Lawrence Berkeley National Laboratory
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Joseph G. Checkelsky
- Massachusetts Institute of Technology
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Liang Fu
- Massachusetts Institute of Technology
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Bohm-Jung Yang
- Seoul National University
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Riccardo Comin
- Massachusetts Institute of Technology
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
PHYSICAL REVIEW B
no. 110,
ISSN: 2469-9950 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Oh D., Kang J., Qian Y., Fang S., Kang M., Jozwiak C., Bostwick A., Rotenberg E., Checkelsky J. G., Fu L., Klimczuk T., Winiarski M., Yang B., Comin R.: Nodal fermions in the strongly spin-orbit coupled pyrochlore-lattice compound RbBi2// PHYSICAL REVIEW B -Vol. 110,iss. 20 (2024),
- DOI:
- Digital Object Identifier (open in new tab) 10.1103/physrevb.110.205102
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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