Muonic study of type II superconductors |
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Authors: | A D Sidorenko V P Smilga V I Fesenko |
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Institution: | (1) Kurchatov Institute, 123182 Moscow, USSR |
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Abstract: | A theory of μSR method is developed for uniaxial anisotropic high-T
c superconductors. In two extreme cases ofH
ext‖c
andH
ext⊥c
analytical formulas are obtained which makes it possible to determine from the position of van Hove singularities in the
Fourier-spectrum of muonium polarization, the type and parameters of the vortex lattice, such as λ
ab
(λ
c
). In caseH
ext≲H
c2 we obtained the shape of the Fourier-spectrum in analytical form and the simple method of determining the Ginsburg-Landau
parameter κ.
Convenient expressions for numerical calculations are obtained for the arbitrary orientation of the external field, and an
algorithm is provided to compute the mean fieldB, the vortex lattice parameters and the bulk field distribution in anisotropic superconductor. The Fourier spectrum of polarization
based on these calculations can be used to independently check the validity of the high-T
c parameters determination for “appropriate” orientations. |
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Keywords: | |
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