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Polar Kerr-Effect Measurements of the High-Temperature Superconductor: Evidence for Broken Symmetry near the Pseudogap Temperature

Authors

Jing Xia, Elizabeth Schemm, G Deutscher, SA Kivelson, DA Bonn, WN Hardy, R Liang, W Siemons, Gertjan Koster, MM Fejer, A Kapitulnik

Publication date

2008/3/28

Journal

Physical Review Letters

Volume

100

Issue

Pages

127002

Publisher

American Physical Society

Description

The polar Kerr effect in the high- superconductor was measured at zero magnetic field with high precision using a cyogenic Sagnac fiber interferometer. We observed nonzero Kerr rotations of order appearing near the pseudogap temperature and marking what appears to be a true phase transition. Anomalous magnetic behavior in magnetic-field training of the effect suggests that time reversal symmetry is already broken above room temperature.

Total citations

Cited by 528

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