Topological Signatures in Nodal Semimetals through Neutron Scattering
Name
Nguyen_2022_New_J._Phys._24_013016.pdf
Description
Published version
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3.04 MB
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Author(s)
Nguyen, Thanh
Tsurimaki, Yoichiro
Pablo-Pedro, Ricardo
Bednik, Grigory
Liu, Tongtong
Apte, Anuj
Andrejevic, Nina
Li, Mingda
Date Issued
2022
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Nguyen, Thanh, Tsurimaki, Yoichiro, Pablo-Pedro, Ricardo, Bednik, Grigory, Liu, Tongtong et al. 2022. "Topological Signatures in Nodal Semimetals through Neutron Scattering." New Journal of Physics, 24 (1).
Version
Final published version
Abstract
Abstract
Topological nodal semimetals are known to host a variety of fascinating electronic properties due to the topological protection of the band-touching nodes. Neutron scattering, despite its power in probing elementary excitations, has not been routinely applied to topological semimetals, mainly due to the lack of an explicit connection between the neutron response and the signature of topology. In this work, we theoretically investigate the role that neutron scattering can play to unveil the topological nodal features: a large magnetic neutron response with spectral non-analyticity can be generated solely from the nodal bands. A new formula for the dynamical structure factor for generic topological nodal metals is derived. For Weyl semimetals, we show that the locations of Weyl nodes, the Fermi velocities and the signature of chiral anomaly can all leave hallmark neutron spectral responses. Our work offers a neutron-based avenue toward probing bulk topological materials.
Topological nodal semimetals are known to host a variety of fascinating electronic properties due to the topological protection of the band-touching nodes. Neutron scattering, despite its power in probing elementary excitations, has not been routinely applied to topological semimetals, mainly due to the lack of an explicit connection between the neutron response and the signature of topology. In this work, we theoretically investigate the role that neutron scattering can play to unveil the topological nodal features: a large magnetic neutron response with spectral non-analyticity can be generated solely from the nodal bands. A new formula for the dynamical structure factor for generic topological nodal metals is derived. For Weyl semimetals, we show that the locations of Weyl nodes, the Fermi velocities and the signature of chiral anomaly can all leave hallmark neutron spectral responses. Our work offers a neutron-based avenue toward probing bulk topological materials.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1088/1367-2630/AC45CB
