Has the nonlinear Meissner effect been observed?

Details Has the nonlinear Meissner effect been observed? Has the nonlinear Meissner effect been observed?

2000-11-01

arxiv.org/abs/cond-mat/0011021v1

Phys. Rev. B63 180405 (2001)

Physics

Condensed Matter

Superconductivity

4 text pages plus 3 postscript figures

Scientific paper

10.1103/PhysRevB.63.180405

We examine recent high-precision experimental data on the magnetic field, ${\bf H}$, dependence of the penetration depth $\lambda(H)$ in $\rm{YBa_2Cu_3O_{7-\delta}}$ (YBCO) for several field directions in the $a-b$ plane. In a new theoretical analysis that incorporates the effects of orthorhombic symmetry, we show that the data at sufficiently high magnetic fields and low temperatures are in quantitative agreement with the theoretical predictions of the nonlinear Meissner effect.

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