期刊
PHYSICAL REVIEW LETTERS
卷 91, 期 19, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.91.197001
关键词
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We report observations of spontaneous formation of magnetic flux lines during a rapid quench of YBa2Cu3O7-delta films through T-c. This effect is predicted according to the Kibble-Zurek mechanism of creation of topological defects of the order parameter during a symmetry-breaking phase transition. Our previous experiment, at a quench rate of 20 K/s, gave null results. In the present experiment, the quench rate was increased to >10(8) K/s. The amount of spontaneous flux increases weakly with the cooling rate.
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