Magnetic interactions and dynamics of holes in CuO2 planes of high-Tc superconducting materials
V. Hizhnyakov, E. Sigmund, M. Schneider
DOI 10.1103/PhysRevB.44.795 · Physical Review B
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Abstract
Starting from the two-band Hubbard Hamiltonian a systematic derivation of the spin-dependent interactions within the CuO2 planes of the perovskite high-Tc superconductors is presented, taking the remarkably strong Cu-O hybridization of these materials into account. We show that in the case of hole doping the kinetic energy of the holes plays a dominant role leading to a ferromagnetic ordering in the surrounding of an additional hole (ferron state). In addition we show that any reduction of the two-band model to a one-band model clearly underestimates the influence of the kinetic energy of the holes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O6 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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