Spin-charge-orbital order in nickelate superconductors
Binhua Zhang, Changsong Xu, Hongjun Xiang
DOI 10.1103/PhysRevB.111.184401 · Physical Review B
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Abstract
The nickelate superconductors bilayer La3Ni2O7 and trilayer La4Ni3O10 exhibit remarkable high-temperature superconductivity under applied pressure, sparking considerable research attention. However, the nature of their spin, charge, and orbital order remains elusive. Here, supported by symmetry analysis and density functional theory calculations, we identify a double-stripe ground state of La3Ni2O7. Such magnetic order is accompanied by a charge density wave in Pmnm phase, intertwined with the dz21dx2−y21 (3d8) and dz21 (3d7) orbital order. Furthermore, for trilayer La4Ni3O10, we demonstrate the existence of a long-range incommensurate spin density wave. Additionally, we point out that the Ni2+, Ni3+, and rare Ni4+ orders coexist in the La4Ni3O10 system due to interlayer antiferromagnetic frustration. Our work thus reveals a systematic spin-charge-orbital picture for La3Ni2O7 and La4Ni3O10, paving the way for further understanding the mechanism of nickelate-based superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La4Ni3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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