Field Induced Reduction of the Low Temperature Superfluid Density in YBa2Cu3O6.95

Details Field Induced Reduction of the Low Temperature Superfluid Density in YBa2Cu3O6.95 Field Induced Reduction of the Low Temperature Superfluid Density in YBa2Cu3O6.95

1999-06-30

arxiv.org/abs/cond-mat/9906452v2

Physical Review Letters 83, 4156 (1999)

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures, 1 RevTex file and 4 postscript figures

Scientific paper

10.1103/PhysRevLett.83.4156

A novel high magnetic field (8 T) spectrometer for muon spin rotation has been used to measure the temperature dependence of the in-plane magnetic penetration depth in YBa2Cu3O6.95. At low H and low T, the penetration depth exhibits the characteristic linear T dependence associated with the energy gap of a d_x^2-y^2-wave superconductor. However, at higher fields the penetration depth is essentially temperature independent at low T. We discuss possible interpretations of this surprising new feature in the low-energy excitation spectrum.

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