Effects of an in-plane magnetic field on c-axis sum rule and superfluid density in high-Tc cuprates
نویسنده
چکیده
In layered cuprates, the application of an in-plane magnetic field (H) changes the c-axis optical sum rule and superfluid density ρs. For pure incoherent caxis coupling, H has no effect on either quantities but it does if an additional coherent component is present. For the coherent contribution, different characteristic variations on H and on temperature result from the constant part (t⊥) of the hopping matrix element and from the part (tφ) which has zero on the diagonal of the Brillouin zone. Only the constant part (t⊥) leads to a dependence on the direction of H as well as on its magnitude. PACS numbers: 74.20.-z,74.25.Gz Typeset using REVTEX
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