Effects of an in-plane magnetic field on c-axis sum rule and superfluid density in high-$T_{c}$ cuprates

Details Effects of an in-plane magnetic field on c-axis sum rule and superfluid density in high-$T_{c}$ cuprates Effects of an in-plane magnetic field on c-axis sum rule and superfluid density in high-$T_{c}$ cuprates

2000-10-20

arxiv.org/abs/cond-mat/0010324v1

Physics

Condensed Matter

Superconductivity

3 figures

Scientific paper

10.1103/PhysRevB.63.140505

In layered cuprates, the application of an in-plane magnetic field $({\bf H})$ changes the c-axis optical sum rule and superfluid density $\rho_{s}$. For pure incoherent c-axis coupling, ${\bf H}$ has no effect on either quantities but it does if an additional coherent component is present. For the coherent contribution, different characteristic variations on ${\bf H}$ and on temperature result from the constant part $(t_{\perp})$ of the hopping matrix element and from the part $(t_{\phi})$ which has zero on the diagonal of the Brillouin zone. Only the constant part $(t_{\perp})$ leads to a dependence on the direction of ${\bf H}$ as well as on its magnitude.

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