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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

  • Dubroka, Adam University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Rössle, Matthias University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Kim, Kyung Wan University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Malik, Vivek Kumar University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Munzar, Dominik Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Brno, Czech Republic
  • Basov, D. N. Department of Physics, University of California, San Diego, La Jolla, USA
  • Schafgans, A. A. Department of Physics, University of California, San Diego, La Jolla, USA
  • Moon, S. J. Department of Physics, University of California, San Diego, La Jolla, USA
  • Lin, C. T. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Haug, D. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Hinkov, V. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Keimer, B. Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
  • Wolf, Th. Karlsruhe Institute of Technology, Institut für Festkörperphysik, Karlsruhe, Germany
  • Storey, J. G. MacDiarmid Institute, Industrial Research Ltd., Lower Hutt, New Zealand
  • Tallon, Jeffery L. MacDiarmid Institute, Industrial Research Ltd., Lower Hutt, New Zealand
  • Bernhard, Christian University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
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    27.01.2011
Published in:
  • Physical Review Letters. - 2011, vol. 106, no. 4, p. 047006
English 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.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301896
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