Evidence for charged critical fluctuations in underdoped Y-123

Details Evidence for charged critical fluctuations in underdoped Y-123 Evidence for charged critical fluctuations in underdoped Y-123

2004-06-28

arxiv.org/abs/cond-mat/0406691v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

We report and analyze in-plane penetration depth measurements in YBa2Cu3O7-x
taken close to the critical temperature Tc. In underdoped YBa2Cu3O6:59 we find
consistent evidence for charged critical behavior. Noting that the effective
dimensionless charge scales as 1/sqrt(Tc), this new critical behavior should be
generically observable in suitably underdoped cuprates.

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