Polar Kerr Effect Measurements of YBa2Cu3O6+x: Evidence for Broken Symmetry Near the Pseudogap Temperature
| Autor: | Xia, Jing, Schemm, Elizabeth, Deutscher, G., Kivelson, S. A., Bonn, D. A., Hardy, W. N., Liang, R., Siemons, W., Koster, G., Fejer, M. M., Kapitulnik, A. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 100, 127002 (2008) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.100.127002 |
| Popis: | Polar Kerr effect in the high-Tc superconductor \YBCO was measured at zero magnetic field with high precision using a cyogenic Sagnac fiber interferometer. We observed non-zero Kerr rotations of order $\sim 1 \mu$rad appearing near the pseudogap temperature $T^*$, 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. Comment: 4 pages, 5 figures, submitting to PRL |
| Databáze: | arXiv |
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