Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 24, Pages 5170-5173Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5170
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One of the present intensive concerns about the high-temperature superconductors is whether charge stripes are a key to superconductivity. Here we report observation of charge stripes in the simplest copper oxide, CuO, by real-space images obtained by electron microscopy. Charge-ordered domains and normal-lattice domains exist alternatively in the vapor-grown single crystal of CuO. Since CuO consists of the Cu-O bonding, which is a basic material feature for high-T-c cuprates, the discovery of charge stripes in this basic compound has important implications for discussing the mechanism of superconductivity in complex cuprates.
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