Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet
Fe _3 GeTe _2 has gained attention in the condensed matter community for its potential to be exfoliated into thin films with ferromagnetic (FM) order, thanks to its van der Waals layered structure and significant intrinsic anomalous Hall conductivity (AHC). In this work, we analyze the electronic st...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | JPhys Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2515-7639/adeecb |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839610382448066560 |
|---|---|
| author | Mikel García-Díez Haim Beidenkopf Iñigo Robredo M G Vergniory |
| author_facet | Mikel García-Díez Haim Beidenkopf Iñigo Robredo M G Vergniory |
| author_sort | Mikel García-Díez |
| collection | DOAJ |
| description | Fe _3 GeTe _2 has gained attention in the condensed matter community for its potential to be exfoliated into thin films with ferromagnetic (FM) order, thanks to its van der Waals layered structure and significant intrinsic anomalous Hall conductivity (AHC). In this work, we analyze the electronic structure and show that, contrary to prior claims, the bulk of the AHC cannot arise only from gapped nodal lines. By studying the material’s symmetry properties, both with and without spin–orbit coupling (SOC) and across paramagnetic and FM phases, we find that Fe _3 GeTe _2 hosts mirror-symmetry-protected nodal lines, which support surface drumhead states. Additionally, we identify three key sources of AHC: nodal lines in the paramagnetic phase gapped by the FM order, Weyl points within specific energy ranges, and gaps between spin-up and spin-down bands caused by SOC. Finally, our calculations suggest that electron doping could increase the AHC up to four times compared to its value at the computed Fermi level. |
| format | Article |
| id | doaj-art-25ea8d2fbe1a43b0af8eb638a4739e4c |
| institution | Matheson Library |
| issn | 2515-7639 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | JPhys Materials |
| spelling | doaj-art-25ea8d2fbe1a43b0af8eb638a4739e4c2025-07-29T12:15:31ZengIOP PublishingJPhys Materials2515-76392025-01-018303501210.1088/2515-7639/adeecbOrigins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnetMikel García-Díez0https://orcid.org/0000-0002-5035-7767Haim Beidenkopf1Iñigo Robredo2https://orcid.org/0000-0003-1641-354XM G Vergniory3https://orcid.org/0000-0001-7336-3062Donostia International Physics Center , Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastian, Spain; Physics Department, University of the Basque Country (UPV/EHU) , Leioa, SpainDepartment of Condensed Matter Physics, Weizmann Institute of Science , Rehovot, IsraelLuxembourg Institute of Science and Technology (LIST) , Avenue des Hauts-Fourneaux 5, L-4362 Esch/Alzette, LuxembourgDonostia International Physics Center , Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastian, Spain; Département de Physique et Institut Quantique, Université de Sherbrooke , Sherbrooke J1K 2R1, Québec, Canada; Regroupement Québécois sur les Matériaux de Pointe (RQMP) , Quebec H3T 3J7, CanadaFe _3 GeTe _2 has gained attention in the condensed matter community for its potential to be exfoliated into thin films with ferromagnetic (FM) order, thanks to its van der Waals layered structure and significant intrinsic anomalous Hall conductivity (AHC). In this work, we analyze the electronic structure and show that, contrary to prior claims, the bulk of the AHC cannot arise only from gapped nodal lines. By studying the material’s symmetry properties, both with and without spin–orbit coupling (SOC) and across paramagnetic and FM phases, we find that Fe _3 GeTe _2 hosts mirror-symmetry-protected nodal lines, which support surface drumhead states. Additionally, we identify three key sources of AHC: nodal lines in the paramagnetic phase gapped by the FM order, Weyl points within specific energy ranges, and gaps between spin-up and spin-down bands caused by SOC. Finally, our calculations suggest that electron doping could increase the AHC up to four times compared to its value at the computed Fermi level.https://doi.org/10.1088/2515-7639/adeecbnodal linesvan der Waals materialsanomalous Hall conductivitymagnetism |
| spellingShingle | Mikel García-Díez Haim Beidenkopf Iñigo Robredo M G Vergniory Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet JPhys Materials nodal lines van der Waals materials anomalous Hall conductivity magnetism |
| title | Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet |
| title_full | Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet |
| title_fullStr | Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet |
| title_full_unstemmed | Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet |
| title_short | Origins of the anomalous Hall conductivity in the symmetry enforced Fe3GeTe2 nodal-line ferromagnet |
| title_sort | origins of the anomalous hall conductivity in the symmetry enforced fe3gete2 nodal line ferromagnet |
| topic | nodal lines van der Waals materials anomalous Hall conductivity magnetism |
| url | https://doi.org/10.1088/2515-7639/adeecb |
| work_keys_str_mv | AT mikelgarciadiez originsoftheanomaloushallconductivityinthesymmetryenforcedfe3gete2nodallineferromagnet AT haimbeidenkopf originsoftheanomaloushallconductivityinthesymmetryenforcedfe3gete2nodallineferromagnet AT inigorobredo originsoftheanomaloushallconductivityinthesymmetryenforcedfe3gete2nodallineferromagnet AT mgvergniory originsoftheanomaloushallconductivityinthesymmetryenforcedfe3gete2nodallineferromagnet |