| Title | Evidence of a precursor superconducting phase at temperatures as high as 180 K in RBa2Cu3O7-δ (R=Y,Gd,Eu) superconducting crystals from infrared spectroscopy |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Dubroka, A., Rössle M., Kim K. W., Malik V. K., Munzar D., Basov D. N., Schafgans A. A., Moon S. J., Lin C. T., Haug D., Hinkov V., Keimer B., Wolf T., Storey J. G., Tallon J. L., and Bernhard C. |
| Journal | Physical Review Letters |
| Volume | 106 |
| Keywords | Copper compounds, Cuprates, Europium, Gadolinium, High temperature superconductors, infrared spectroscopy, Low energies, Magnetic fields, Phase diagrams, Pseudo-gap, Superconducting crystal, Superconducting phase, Superconducting state, Superconductivity, Underdoping |
| Abstract | We show that a multilayer analysis of the infrared c-axis response of RBa2Cu3O7-δ(R=Y,Gd,Eu) provides important new information about the anomalous normal-state properties of underdoped cuprate high temperature superconductors. In addition to competing correlations which give rise to a pseudogap that depletes the low-energy electronic states below T * Tc, it enables us to identify the onset of a precursor superconducting state below Tons>Tc. We map out the doping phase diagram of Tons which reaches a maximum of 180? K at strong underdoping and present magnetic field dependent data which confirm our conclusions. © 2011 American Physical Society. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-79251503297&partnerID=40&md5=b6e5f38894e1cf31f94e38f16892f3b8 |
| DOI | 10.1103/PhysRevLett.106.047006 |
