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| Home > Publications database > Suppression of the outwards-dispersing branches in hour-glass magnetic spectra induced by nanoscale phase separation in La 2 − x Sr x CoO 4 > print |
| Home > Publications database > Suppression of the outwards-dispersing branches in hour-glass magnetic spectra induced by nanoscale phase separation in La 2 − x Sr x CoO 4 > print |
| 001 | 865387 | ||
| 005 | 20250129094301.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevB.100.014411 |2 doi |
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| 100 | 1 | _ | |a Guo, H. |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Suppression of the outwards-dispersing branches in hour-glass magnetic spectra induced by nanoscale phase separation in La 2 − x Sr x CoO 4 |
| 260 | _ | _ | |a Woodbury, NY |c 2019 |b Inst. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Here, we reinvestigate the underlying charge and magnetic correlations in La2−xSrxCoO4 within a combined study of muon spin relaxation (μSR), x-ray photon correlation spectroscopy, synchrotron radiation single-crystal x-ray diffraction, and neutron-scattering measurements. For La2−xSrxCoO4 around 1/3 hole-doping, the significant charge correlations that are responsible for the emergence of hour-glass magnetic spectra are found to be slowly fluctuating checkerboard charge ordering (CBCO) correlations with an onset temperature being independent of hole-doping. This reveals a local origin of the CBCO correlations in the rather ionic cobaltates, thus being distinct from the more covalent nickelates. Moreover, we report the observation of a very similar temperature dependence of the intensities of in-plane high- and low-energy excitations within the La2−xSrxCoO4 hour-glass spectrum. This observation shows that nano phase separation is distinct from conventional phase separation and that there is a coupling between nanometer-sized undoped and hole-doped islands. Based on this, it is possible to propose a microscopic scenario for the suppression of the outwards-dispersing branches in hour-glass magnetic spectra. |
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| 773 | 1 | 8 | |a 10.1103/physrevb.100.014411 |b American Physical Society (APS) |d 2019-07-09 |n 1 |p 014411 |3 journal-article |2 Crossref |t Physical Review B |v 100 |y 2019 |x 2469-9950 |
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