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Evidence for charged critical fluctuations in underdoped Y-123

T. Schneider·R. Khasanov·K. Conder·E. Pomjakushina·R. Bruetsch·H. Keller
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Abstract

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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T. Schneider, R. Khasanov, K. Conder, E. Pomjakushina, R. Bruetsch, H. Keller. 2004-06-28. Evidence for charged critical fluctuations in underdoped Y-123. https://arxiv.org/abs/cond-mat/0406691

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