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arXiv · 1009.2925

Evidence of precursor superconductivity as high as 180 K from infrared spectroscopy

A. Dubroka·M. Roessle·K. W. Kim·V. K. Malik·D. Munzar·D. N. Basov·A. Schafgans·S. J. Moon·C. T. Lin·D. Haug·V. Hinkov·B. Keimer·Th. Wolf·J. G. Storey·J. L. Tallon·C. Bernhard
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Abstract

We show that a multilayer analysis of the infrared c-axis response of RBa2Cu3O7-d (R=Y, Gd, Eu) provides important new information about the anomalous normal state properties of underdoped cuprate high temperature superconductors. Besides 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.

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A. Dubroka, M. Roessle, K. W. Kim, V. K. Malik, D. Munzar, D. N. Basov, A. Schafgans, S. J. Moon, C. T. Lin, D. Haug, V. Hinkov, B. Keimer, Th. Wolf, J. G. Storey, J. L. Tallon, C. Bernhard. 2010-09-15. Evidence of precursor superconductivity as high as 180 K from infrared spectroscopy. https://doi.org/10.1103/physrevlett.106.047006

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