Evidence of two-dimensional quantum critical behavior in the superfluid density of extremely underdoped Bi 2Sr 2CaCu 2O 8+x

Jie Yong, M. J. Hinton, A. McCray, M. Randeria, M. Naamneh, A. Kanigel, T. R. Lemberger

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Evidence of two-dimensional (2D) quantum critical fluctuations is observed in the superfluid density n s(T) λ -2(T) of extremely underdoped Bi 2Sr 2CaCu 2O 8+x (Bi-2212) films, indicating that, in general, quantum fluctuations play a dominant role in underdoped cuprates. Two-dimensional (2D) fluctuations are expressed by the linear scaling T c n s(0). 2D scaling in Bi-2212 contrasts with three-dimensional scaling that is seen in the much less anisotropic YBa 2Cu 3O 7-δ. Quantum critical fluctuations could also account for the absence of thermal critical behavior in λ -2(T) of strongly underdoped Bi-2212 samples, T c<48 K.

Original languageEnglish
Article number180507
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number18
DOIs
StatePublished - 24 May 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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