Charge order in the pseudogap phase of cuprate superconductors
Charge ordering instabilities are studied in a multiorbital model of cuprate superconductors. A known, key feature of this model is that the large local Coulomb interaction in the Cu ${{d}_{{{x}^{2}}-{{y}^{2}}}}$ orbitals generates local moments with short range antiferromagnetic (AF) correlations....
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/1/013025 |
| _version_ | 1797751228508143616 |
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| author | W A Atkinson A P Kampf S Bulut |
| author_facet | W A Atkinson A P Kampf S Bulut |
| author_sort | W A Atkinson |
| collection | DOAJ |
| description | Charge ordering instabilities are studied in a multiorbital model of cuprate superconductors. A known, key feature of this model is that the large local Coulomb interaction in the Cu ${{d}_{{{x}^{2}}-{{y}^{2}}}}$ orbitals generates local moments with short range antiferromagnetic (AF) correlations. The strong simplifying ansatz that these moments are static and ordered allows us to explore a regime not generally accessible to weak-coupling approaches. The AF correlations lead to a pseudogap-like reconstruction of the Fermi surface. We find that the leading charge instability within this pseudogap-like state is to a phase with a spatially modulated transfer of charge between neighbouring oxygen p _x and p _y orbitals accompanied by weak modulations of the charge density on the Cu ${{d}_{{{x}^{2}}-{{y}^{2}}}}$ orbitals. As a prime result of the AF Fermi-surface reconstruction, the wavevectors of the charge modulations are oriented along the crystalline axes with a periodicity that agrees quantitatively with experiments. This suggests a resolution to a discrepancy between experiments, which find axial order, and previous theoretical calculations, which find modulation wavevectors along the Brillouin zone diagonal. The axial order is stabilized by hopping processes via the Cu4 s orbital, which is commonly not included in model analyses of cuprate superconductors. The main implication of our results is that charge order emerges from the pseudogap state, and is not the primary source of the pseudogap. |
| first_indexed | 2024-03-12T16:45:30Z |
| format | Article |
| id | doaj.art-62d18206a1a941c3beffdfec622a555b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:45:30Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-62d18206a1a941c3beffdfec622a555b2023-08-08T14:16:26ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117101302510.1088/1367-2630/17/1/013025Charge order in the pseudogap phase of cuprate superconductorsW A Atkinson0A P Kampf1S Bulut2Department of Physics and Astronomy, Trent University , Peterborough, Ontario K9J 7B8, CanadaTheoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg , D-86135 Augsburg, GermanyDepartment of Physics and Astronomy, Trent University , Peterborough, Ontario K9J 7B8, Canada; Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg , D-86135 Augsburg, GermanyCharge ordering instabilities are studied in a multiorbital model of cuprate superconductors. A known, key feature of this model is that the large local Coulomb interaction in the Cu ${{d}_{{{x}^{2}}-{{y}^{2}}}}$ orbitals generates local moments with short range antiferromagnetic (AF) correlations. The strong simplifying ansatz that these moments are static and ordered allows us to explore a regime not generally accessible to weak-coupling approaches. The AF correlations lead to a pseudogap-like reconstruction of the Fermi surface. We find that the leading charge instability within this pseudogap-like state is to a phase with a spatially modulated transfer of charge between neighbouring oxygen p _x and p _y orbitals accompanied by weak modulations of the charge density on the Cu ${{d}_{{{x}^{2}}-{{y}^{2}}}}$ orbitals. As a prime result of the AF Fermi-surface reconstruction, the wavevectors of the charge modulations are oriented along the crystalline axes with a periodicity that agrees quantitatively with experiments. This suggests a resolution to a discrepancy between experiments, which find axial order, and previous theoretical calculations, which find modulation wavevectors along the Brillouin zone diagonal. The axial order is stabilized by hopping processes via the Cu4 s orbital, which is commonly not included in model analyses of cuprate superconductors. The main implication of our results is that charge order emerges from the pseudogap state, and is not the primary source of the pseudogap.https://doi.org/10.1088/1367-2630/17/1/013025high temperature superconductorscharge ordernematicitypseudogap74.72.Kf74.20.-z |
| spellingShingle | W A Atkinson A P Kampf S Bulut Charge order in the pseudogap phase of cuprate superconductors New Journal of Physics high temperature superconductors charge order nematicity pseudogap 74.72.Kf 74.20.-z |
| title | Charge order in the pseudogap phase of cuprate superconductors |
| title_full | Charge order in the pseudogap phase of cuprate superconductors |
| title_fullStr | Charge order in the pseudogap phase of cuprate superconductors |
| title_full_unstemmed | Charge order in the pseudogap phase of cuprate superconductors |
| title_short | Charge order in the pseudogap phase of cuprate superconductors |
| title_sort | charge order in the pseudogap phase of cuprate superconductors |
| topic | high temperature superconductors charge order nematicity pseudogap 74.72.Kf 74.20.-z |
| url | https://doi.org/10.1088/1367-2630/17/1/013025 |
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