1. Direct evidence for charge stripes in a layered cobalt oxide
- Author
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Babkevich, P, Freeman, Paul Gregory, Enderle, M, Prabhakaran, D, Boothroyd, AT, Babkevich, P, Freeman, Paul Gregory, Enderle, M, Prabhakaran, D, and Boothroyd, AT
- 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 La5/3 Sr1/3 CoO4 , 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 hour- glass shape of the magnetic spectrum previously observed in neutron scattering mea- surements of La2−xSrx CoO4 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.
- Published
- 2016