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

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

2010-09-15

arxiv.org/abs/1009.2925v1

Phy. Rev. Lett. 106, 047006 (2011)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.106.047006

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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