Dissipationless transport signature of topological nodal lines
Abstract Topological materials, such as topological insulators or semimetals, usually not only reveal the non-trivial properties of their electronic wavefunctions through the appearance of stable boundary modes, but also through very specific electromagnetic responses. The anisotropic longitudinal m...
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Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61059-8 |
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| author | Arthur Veyrat Klaus Koepernik Louis Veyrat Grigory Shipunov Iryna Kovalchuk Saicharan Aswartham Jiang Qu Ankit Kumar Michele Ceccardi Federico Caglieris Nicolás Pérez Romain Giraud Bernd Büchner Jeroen van den Brink Carmine Ortix Joseph Dufouleur |
| author_facet | Arthur Veyrat Klaus Koepernik Louis Veyrat Grigory Shipunov Iryna Kovalchuk Saicharan Aswartham Jiang Qu Ankit Kumar Michele Ceccardi Federico Caglieris Nicolás Pérez Romain Giraud Bernd Büchner Jeroen van den Brink Carmine Ortix Joseph Dufouleur |
| author_sort | Arthur Veyrat |
| collection | DOAJ |
| description | Abstract Topological materials, such as topological insulators or semimetals, usually not only reveal the non-trivial properties of their electronic wavefunctions through the appearance of stable boundary modes, but also through very specific electromagnetic responses. The anisotropic longitudinal magnetoresistance of Weyl semimetals, for instance, carries the signature of the chiral anomaly of Weyl fermions. However for topological nodal line semimetals—materials where the valence and conduction bands cross each other on one-dimensional curves in the three-dimensional Brillouin zone—such a characteristic has been lacking. Here we report the discovery of a peculiar charge transport effect generated by topological nodal lines in trigonal crystals: a dissipationless transverse signal in the presence of coplanar electric and magnetic fields, which we attribute to a Zeeman-induced conversion of topological nodal lines into Weyl nodes under infinitesimally small magnetic fields. We evidence this dissipationless topological response in trigonal PtBi2 persisting up to room temperature, consistent with the presence of extensive topological nodal lines in the band structure of this non-magnetic material. These findings provide a pathway to engineer Weyl nodes by arbitrary small magnetic fields and reveal that bulk topological nodal lines can exhibit non-dissipative transport properties. |
| format | Article |
| id | doaj-art-2f99b0148dd24934bacf610c936d8eac |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-2f99b0148dd24934bacf610c936d8eac2025-08-20T03:43:00ZengNature PortfolioNature Communications2041-17232025-07-011611710.1038/s41467-025-61059-8Dissipationless transport signature of topological nodal linesArthur Veyrat0Klaus Koepernik1Louis Veyrat2Grigory Shipunov3Iryna Kovalchuk4Saicharan Aswartham5Jiang Qu6Ankit Kumar7Michele Ceccardi8Federico Caglieris9Nicolás Pérez10Romain Giraud11Bernd Büchner12Jeroen van den Brink13Carmine Ortix14Joseph Dufouleur15Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Department of Physics, University of GenoaCNR-SPIN InstituteLeibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Leibniz Institute for Solid State and Materials Research (IFW Dresden)Dipartimento di Fisica “E. R. Caianiello”, Universitá di SalernoLeibniz Institute for Solid State and Materials Research (IFW Dresden)Abstract Topological materials, such as topological insulators or semimetals, usually not only reveal the non-trivial properties of their electronic wavefunctions through the appearance of stable boundary modes, but also through very specific electromagnetic responses. The anisotropic longitudinal magnetoresistance of Weyl semimetals, for instance, carries the signature of the chiral anomaly of Weyl fermions. However for topological nodal line semimetals—materials where the valence and conduction bands cross each other on one-dimensional curves in the three-dimensional Brillouin zone—such a characteristic has been lacking. Here we report the discovery of a peculiar charge transport effect generated by topological nodal lines in trigonal crystals: a dissipationless transverse signal in the presence of coplanar electric and magnetic fields, which we attribute to a Zeeman-induced conversion of topological nodal lines into Weyl nodes under infinitesimally small magnetic fields. We evidence this dissipationless topological response in trigonal PtBi2 persisting up to room temperature, consistent with the presence of extensive topological nodal lines in the band structure of this non-magnetic material. These findings provide a pathway to engineer Weyl nodes by arbitrary small magnetic fields and reveal that bulk topological nodal lines can exhibit non-dissipative transport properties.https://doi.org/10.1038/s41467-025-61059-8 |
| spellingShingle | Arthur Veyrat Klaus Koepernik Louis Veyrat Grigory Shipunov Iryna Kovalchuk Saicharan Aswartham Jiang Qu Ankit Kumar Michele Ceccardi Federico Caglieris Nicolás Pérez Romain Giraud Bernd Büchner Jeroen van den Brink Carmine Ortix Joseph Dufouleur Dissipationless transport signature of topological nodal lines Nature Communications |
| title | Dissipationless transport signature of topological nodal lines |
| title_full | Dissipationless transport signature of topological nodal lines |
| title_fullStr | Dissipationless transport signature of topological nodal lines |
| title_full_unstemmed | Dissipationless transport signature of topological nodal lines |
| title_short | Dissipationless transport signature of topological nodal lines |
| title_sort | dissipationless transport signature of topological nodal lines |
| url | https://doi.org/10.1038/s41467-025-61059-8 |
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