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Direct evidence for charge stripes in a layered cobalt oxide

Authors :
Babkevich, P.
Freeman, P. G.
Enderle, M.
Prabhakaran, D.
Boothroyd, A. T.
Source :
Nature Communications 7, 11632 (2016)
Publication Year :
2016

Abstract

Recent experiments indicate that static stripe-like charge order is generic to the hole-doped copper oxide superconductors and competes with superconductivity. Here we show that a similar type of charge order is present in La$_{5/3}$Sr$_{1/3}$CoO$_4$, an insulating analogue of the copper oxide superconductors containing cobalt in place of copper. The stripe phase we have detected is accompanied by short-range, quasi-one-dimensional, antiferromagnetic order, and provides a natural explanation for the distinctive hourglass shape of the magnetic spectrum previously observed in neutron scattering measurements of La$_{5/3}$Sr$_{1/3}$CoO$_4$ and many hole-doped copper oxide superconductors. The results establish a solid empirical basis for theories of the hourglass spectrum built on short-range, quasi-static, stripe correlations.

Details

Database :
arXiv
Journal :
Nature Communications 7, 11632 (2016)
Publication Type :
Report
Accession number :
edsarx.1605.07087
Document Type :
Working Paper
Full Text :
https://doi.org/10.1038/ncomms11632