Journal of Superconductivity and Novel Magnetism

, Volume 26, Issue 8, pp 2617–2620 | Cite as

Comparison of 2-D Quantum and Thermal Critical Fluctuations of Underdoped Bi2Sr2CaCu2O8+δ with Ultrathin YBa2Cu3O7−δ

  • Michael J. Hinton
  • Jie Yong
  • Stanley Steers
  • Thomas R. Lemberger
Original Paper

Abstract

This paper addresses two issues. Underdoped Bi-2212 has been shown to exhibit two-dimensional quantum fluctuations, with Tc vs. Ns(0) scaling qualitatively similar to ultrathin YBCO films that are 2-D by construction. The present paper shows that the quantitative difference in scaling is resolved by growing Bi-2212 films that are much smoother than previously used. Also, the absence of 2-D thermal critical behavior from the superfluid density of Bi-2212 films that exhibit 2-D quantum scaling is not likely due to an inhomogeneous Tc smearing out the 2-D thermal transition. Finally, we emphasize that there is as yet no consensus on the physics that drives the T-dependence of Ns at low to intermediate temperatures.

Keywords

Superconductivity Quantum critical scaling Pulsed laser deposition Cuprates 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Michael J. Hinton
    • 1
  • Jie Yong
    • 1
  • Stanley Steers
    • 1
  • Thomas R. Lemberger
    • 1
  1. 1.Ohio State UniversityColumbusUSA

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