This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/23028 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.100.014411 in citations.
Suppression of the outwards-dispersing branches in hour-glass magnetic spectra induced by nanoscale phase separation in La 2 − x Sr x CoO 4
Suppression of the outwards-dispersing branches in hour-glass magnetic spectra induced by nanoscale phase separation in La 2 − x Sr x CoO 4
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/...
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Personal Name(s): | Guo, H. |
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Li, Z. W. / Sakong, S. / Ryu, G. / Zhao, L. / Piovano, A. / Schmidt, W. / Sprung, M. / Strempfer, J. / Francoual, S. / Dzhigaev, D. / Subakti, S. / Hu, Z. / Lin, H. J. / Chen, C. T. / Luetkens, H. / Stockert, O. / Komarek, A. C. (Corresponding author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Physical Review B Physical review / B, 100 100 (2019 2019) 1 1, S. 014411 014411 |
Imprint: |
Woodbury, NY
Inst.
2019
|
DOI: |
10.1103/PhysRevB.100.014411 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.100.014411 in citations.
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. |