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  Charge correlations in cobaltates La2-xSrxCoO4

Guo, H., Schmidt, W., Tjeng, L. H., & Komarek, A. C. (2015). Charge correlations in cobaltates La2-xSrxCoO4. Physica Status Solidi RRL - Rapid Research Letters, 9(10), 580-582. doi:10.1002/pssr.201510290.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-02BD-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-1823-D
Genre: Journal Article

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 Creators:
Guo, H.1, Author              
Schmidt, W.2, Author
Tjeng, L. H.3, Author              
Komarek, A. C.4, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              
4Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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 Abstract: We report on an elastic neutron scattering study of the charge correlations in La2-xSrxCoO4 with x = 1/3, 0.4 and 0.5. We found that the checkerboard charge ordering correlations present in the x = 0.5 sample persist in the x = 0.4 and 1/3 materials. These checkerboard charge ordering correlations are robust and explain the occurrence of nano-phase separation in layered cobaltates for Sr-concentrations away from half-doping. The half-integer reflections then arise from the nanometer-sized hole-rich regions (blue areas in title figure) instead of the undoped ones (red areas in title figure). The appearance of nano-phase separation is an important ingredient for understanding the formation of hour-glass shaped magnetic excitation spectra in La2-xSrxCoO4. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Language(s): eng - English
 Dates: 2015-10-012015-10-01
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000363266800005
DOI: 10.1002/pssr.201510290
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Title: Physica Status Solidi RRL - Rapid Research Letters
  Abbreviation : Phys. Status Solidi RRL
Source Genre: Journal
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Publ. Info: Weinheim : WILEY-VCH
Pages: - Volume / Issue: 9 (10) Sequence Number: - Start / End Page: 580 - 582 Identifier: ISSN: 1862-6270
CoNE: /journals/resource/1862-6270