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| Hauptseite > Publikationsdatenbank > Charge correlations in cobaltates La 2- x Sr x CoO 4 > print |
| 001 | 281111 | ||
| 005 | 20250129094354.0 | ||
| 024 | 7 | _ | |2 doi |a 10.1002/pssr.201510290 |
| 024 | 7 | _ | |2 ISSN |a 1862-6254 |
| 024 | 7 | _ | |2 ISSN |a 1862-6270 |
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| 037 | _ | _ | |a FZJ-2016-00816 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |0 P:(DE-HGF)0 |a Guo, H. |b 0 |
| 245 | _ | _ | |a Charge correlations in cobaltates La 2- x Sr x CoO 4 |
| 260 | _ | _ | |a Weinheim |b Wiley-VCH |c 2015 |
| 336 | 7 | _ | |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |a Journal Article |b journal |m journal |s 1453384824_2881 |
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| 520 | _ | _ | |a Nano-phase separation in La2–xSrx CoO4 (schematically). Red areas: undoped La2CoO4 islands, blue areas: checkerboard charge ordered regions; black, green and blue balls represent nonmagnetic Co3+ ions, magnetic Co2+ ions and oxygen ions, respectively; green arrows indicate Co2+ spins [1, 2].We report on an elastic neutron scattering study of the charge correlations in La2–xSrx CoO4 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–xSrx CoO4. |
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| 700 | 1 | _ | |0 P:(DE-HGF)0 |a Komarek, A. C. |b 3 |e Corresponding author |
| 773 | _ | _ | |0 PERI:(DE-600)2259465-6 |a 10.1002/pssr.201510290 |g Vol. 9, no. 10, p. 580 - 582 |n 10 |p 580 - 582 |t Physica status solidi / Rapid research letters |v 9 |x 1862-6254 |y 2015 |
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