Observation of an Unconventional Metal-Insulator Transition in Overdoped CuO2 Compounds

F. Venturini, M. Opel, T. P. Devereaux, J. K. Freericks, I. Tüttő, B. Revaz, E. Walker, H. Berger, L. Forró, and R. Hackl
Phys. Rev. Lett. 89, 107003 – Published 19 August 2002


The electron dynamics in the normal state of Bi2Sr2CaCu2O8+δ is studied by inelastic light scattering over a wide range of doping. A strong anisotropy of the electron relaxation is found which cannot be explained by single-particle properties alone. The results strongly indicate the presence of an unconventional quantum-critical metal-insulator transition where “hot” (antinodal) quasiparticles become insulating while “cold” (nodal) quasiparticles remain metallic. A phenomenology is developed which allows a quantitative understanding of the Raman results and provides a scenario which links single- and many-particle properties.

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  • Received 26 April 2002


©2002 American Physical Society

Authors & Affiliations

F. Venturini1, M. Opel1, T. P. Devereaux2, J. K. Freericks3, I. Tüttő4, B. Revaz5, E. Walker5, H. Berger6, L. Forró6, and R. Hackl1

  • 1Walther Meissner Institute, Bavarian Academy of Sciences, 85748 Garching, Germany
  • 2Department of Physics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
  • 3Department of Physics, Georgetown University, Washington, D.C. 20057
  • 4RISPO, Hungarian Academy of Sciences, P.O.Box 49, 1525 Budapest, Hungary
  • 5DPMC, University of Geneva, 1121 Genève, Switzerland
  • 6EPFL, Ecublens, 1025 Lausanne, Switzerland

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Vol. 89, Iss. 10 — 2 September 2002

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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