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- W2344637974 abstract "We observe quasi-static incommensurate magnetic peaks in neutron scattering experiments on layered cobalt oxides La2-xSrxCoO4 with high Co oxidation states that have been reported to be paramagnetic. This enables us to measure the magnetic excitations in this highly hole-doped incommensurate regime and compare our results with those found in the low-doped incommensurate regime that exhibit hourglass magnetic spectra. The hourglass shape of magnetic excitations completely disappears given a high Sr doping. Moreover, broad low-energy excitations are found, which are not centered at the incommensurate magnetic peak positions but around the quarter-integer values that are typically exhibited by excitations in the checkerboard charge ordered phase. Our findings suggest that the strong inter-site exchange interactions in the undoped islands are critical for the emergence of hourglass spectra in the incommensurate magnetic phases of La2-xSrxCoO4." @default.
- W2344637974 created "2016-06-24" @default.
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- W2344637974 date "2016-04-27" @default.
- W2344637974 modified "2023-10-07" @default.
- W2344637974 title "Incommensurate spin correlations in highly oxidized cobaltates La2−xSrxCoO4" @default.
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- W2344637974 doi "https://doi.org/10.1038/srep25117" @default.
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