Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7
Abstract Electronic band structures in solids stem from a periodic potential reflecting the structure of either the crystal lattice or electronic order. In the stoichiometric ruthenate Ca3Ru2O7, numerous Fermi surface-sensitive probes indicate a low-temperature electronic reconstruction. Yet, the ca...
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Nature Portfolio
2021
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oai:doaj.org-article:0cf165ff6cc941078845c861747c09002021-12-02T17:04:53ZElectronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O710.1038/s41535-021-00328-32397-4648https://doaj.org/article/0cf165ff6cc941078845c861747c09002021-03-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00328-3https://doaj.org/toc/2397-4648Abstract Electronic band structures in solids stem from a periodic potential reflecting the structure of either the crystal lattice or electronic order. In the stoichiometric ruthenate Ca3Ru2O7, numerous Fermi surface-sensitive probes indicate a low-temperature electronic reconstruction. Yet, the causality and the reconstructed band structure remain unsolved. Here, we show by angle-resolved photoemission spectroscopy, how in Ca3Ru2O7 a C 2-symmetric massive Dirac semimetal is realized through a Brillouin-zone preserving electronic reconstruction. This Dirac semimetal emerges in a two-stage transition upon cooling. The Dirac point and band velocities are consistent with constraints set by quantum oscillation, thermodynamic, and transport experiments, suggesting that the complete Fermi surface is resolved. The reconstructed structure—incompatible with translational-symmetry-breaking density waves—serves as an important test for band structure calculations of correlated electron systems.M. HorioQ. WangV. GranataK. P. KramerY. SassaS. JöhrD. SutterA. BoldL. DasY. XuR. FrisonR. FittipaldiT. K. KimC. CachoJ. E. RaultP. Le FèvreF. BertranN. C. PlumbM. ShiA. VecchioneM. H. FischerJ. ChangNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021) |
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DOAJ |
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DOAJ |
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Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 |
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Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 M. Horio Q. Wang V. Granata K. P. Kramer Y. Sassa S. Jöhr D. Sutter A. Bold L. Das Y. Xu R. Frison R. Fittipaldi T. K. Kim C. Cacho J. E. Rault P. Le Fèvre F. Bertran N. C. Plumb M. Shi A. Vecchione M. H. Fischer J. Chang Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| description |
Abstract Electronic band structures in solids stem from a periodic potential reflecting the structure of either the crystal lattice or electronic order. In the stoichiometric ruthenate Ca3Ru2O7, numerous Fermi surface-sensitive probes indicate a low-temperature electronic reconstruction. Yet, the causality and the reconstructed band structure remain unsolved. Here, we show by angle-resolved photoemission spectroscopy, how in Ca3Ru2O7 a C 2-symmetric massive Dirac semimetal is realized through a Brillouin-zone preserving electronic reconstruction. This Dirac semimetal emerges in a two-stage transition upon cooling. The Dirac point and band velocities are consistent with constraints set by quantum oscillation, thermodynamic, and transport experiments, suggesting that the complete Fermi surface is resolved. The reconstructed structure—incompatible with translational-symmetry-breaking density waves—serves as an important test for band structure calculations of correlated electron systems. |
| format |
article |
| author |
M. Horio Q. Wang V. Granata K. P. Kramer Y. Sassa S. Jöhr D. Sutter A. Bold L. Das Y. Xu R. Frison R. Fittipaldi T. K. Kim C. Cacho J. E. Rault P. Le Fèvre F. Bertran N. C. Plumb M. Shi A. Vecchione M. H. Fischer J. Chang |
| author_facet |
M. Horio Q. Wang V. Granata K. P. Kramer Y. Sassa S. Jöhr D. Sutter A. Bold L. Das Y. Xu R. Frison R. Fittipaldi T. K. Kim C. Cacho J. E. Rault P. Le Fèvre F. Bertran N. C. Plumb M. Shi A. Vecchione M. H. Fischer J. Chang |
| author_sort |
M. Horio |
| title |
Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| title_short |
Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| title_full |
Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| title_fullStr |
Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| title_full_unstemmed |
Electronic reconstruction forming a C 2-symmetric Dirac semimetal in Ca3Ru2O7 |
| title_sort |
electronic reconstruction forming a c 2-symmetric dirac semimetal in ca3ru2o7 |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/0cf165ff6cc941078845c861747c0900 |
| work_keys_str_mv |
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