Evidence of a Precursor Superconducting Phase at Temperatures as High as 180 K in RBa2Cu3O7-delta (R=Y,Gd,Eu) Superconducting Crystals from Infrared Spectroscopy

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Authors

DUBROKA Adam ROESSLE M. KIM K. W. MALIK V. K. MUNZAR Dominik BASOV D. N. SCHAFGANS A. A. MOON S. J. LIN C. T. HAUG D. HINKOV V. KEIMER B. WOLF Th. STOREY J. G. TALLON J. L. BERNHARD C.

Year of publication 2011
Type Article in Periodical
Magazine / Source Physical Review Letters
MU Faculty or unit

Faculty of Science

Citation
Web http://prl.aps.org/abstract/PRL/v106/i4/e047006
Doi http://dx.doi.org/10.1103/PhysRevLett.106.047006
Field Solid matter physics and magnetism
Keywords High-Tc superconductors; infrared response; precursor superconductivity above Tc
Description We show that a miltilayer analysis of the infrared c-axis response of RBa2Cu3O7-delta (R=Y,Gd,Eu) provides important new information about the anomalous normal-state properties of underdoped curprate 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 180K at strong underdoping and present magnetic field dependent data which confirm our conclusions.
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