Is the Nonlinear Meissner Effect Unobservable?

M.-R. Li; P. J. Hirschfeld; P. Wölfle

doi:10.1103/PhysRevLett.81.5640

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Is the Nonlinear Meissner Effect Unobservable?

M.-R. Li, P. J. Hirschfeld, P. Wölfle

DOI 10.1103/PhysRevLett.81.5640 · Physical Review Letters

T1

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Abstract

We examine the effects of nonlocal electrodynamics for a d-wave superconductor on the field dependence of the magnetic penetration depth. The linear field dependence predicted in the local limit, commonly known as the nonlinear Meissner effect, is instead found to be quadratic, δλ∼H2 for fields below a crossover scale H* describing the competition between nonlinear and nonlocal effects in the Meissner state. This crossover is shown to be geometry dependent and for most orientations of the screening currents is of the same order as or greater than Hc1, implying that the nonlinear Meissner effect cannot be observed in this situation. For special orientations where the current flows along the nodal directions, however, the nonlinear Meissner effect may be recovered.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown