期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 18, 页码 4100-4103出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4100
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Commensurate antiferromagnetic ordering has been observed in the superconducting high-T-c. cuprate YBa2Cu3O6.5 (T-c = 55 K) by polarized and unpolarized elastic neutron scattering. The magnetic peak intensity exhibits a marked enhancement at T-c. Zero-field muon-spin-resonance experiments demonstrate that the staggered magnetization is not truly static but fluctuates on a nanosecond time scale. These results point towards an unusual spin density wave state coexisting with superconductivity.
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