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The European Physical Journal Special Topics

, Volume 222, Issue 5, pp 1217–1221 | Cite as

On field effect studies and superconductor-insulator transition in high-Tc cuprates

  • G. Dubuis
  • A. T. Bollinger
  • D. Pavuna
  • I. Božović
Review Superconductors

Abstract

We summarize previous field effect studies in high-T c cuprates and then discuss our method to smoothly tune the carrier concentration of a cuprate film over a wide range using an applied electric field. We synthesized epitaxial one-unit-cell thick films of La2−x Sr x CuO4 and from them fabricated electric double layer transistor devices utilizing various gate electrolytes. We were able to vary the carrier density by about 0.08 carriers per Cu atom, with the resulting change in T c of 30 K. The superconductor-insulator transition occurred at the critical resistance very close to the quantum resistance for pairs, R Q = h/(2e)2 = 6.5 kΩ. This is suggestive of a quantum phase transition, possibly driven by quantum phase fluctuations, between a “Bose insulator” and a high-T c superconductor state.

Keywords

European Physical Journal Special Topic Carrier Density Gate Voltage Quantum Phase Transition Gate Electrode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences and Springer 2013

Authors and Affiliations

  • G. Dubuis
    • 1
    • 2
  • A. T. Bollinger
    • 1
  • D. Pavuna
    • 2
  • I. Božović
    • 1
  1. 1.Condensed Matter Physics and Materials Science DepartmentBrookhaven National LaboratoryUptonUSA
  2. 2.Laboratory for Physics of Complex Matter, CREAM-ICMP–FSB, station 3École Polytechnique Fédérale de LausanneLausanne EPFLSwitzerland

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