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- W3109545472 abstract "We investigate the magnetic excitations in view of the recent reports suggesting that the spin-wave energy may exhibit a significant dependence on the in-plane strain of a thin film of ${mathrm{La}}_{2}{mathrm{CuO}}_{4}$. The nature of dependence, as we find, can be explained naturally within a two-orbital model based on the ${d}_{{x}^{2}ensuremath{-}{y}^{2}}$ and ${d}_{3{z}^{2}ensuremath{-}{r}^{2}}$ orbitals. In particular, as the orbital-splitting energy between the ${d}_{{x}^{2}ensuremath{-}{y}^{2}}$ and ${d}_{3{z}^{2}ensuremath{-}{r}^{2}}$ orbitals increases with compressive strain, the zone-boundary spin-wave energy hardens. However, the hardening persists only until the orbital splitting reaches $ensuremath{sim}2$ eV, beyond which there is no significant change. The behavior of zone-boundary spin-wave energy is explained in terms of the extent of hybridization between one of the exchange-split ${d}_{{x}^{2}ensuremath{-}{y}^{2}}$ bands which is nearly half-filled and the ${d}_{3{z}^{2}ensuremath{-}{r}^{2}}$ band. The role of second order antiferromagnetic superexchange process involving the interorbital hopping is also discussed." @default.
- W3109545472 created "2020-12-07" @default.
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- W3109545472 date "2021-01-15" @default.
- W3109545472 modified "2023-10-16" @default.
- W3109545472 title "Effect of strain-induced orbital splitting on the magnetic excitations in undoped cuprates" @default.
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- W3109545472 doi "https://doi.org/10.1103/physrevb.103.035122" @default.
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