Physics – Condensed Matter – Superconductivity
Scientific paper
1999-06-08
Physical Review Letters 83, 388-391 (1999)
Physics
Condensed Matter
Superconductivity
4 pages RevTeX, including 2 PostScript figures, to appear in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.83.388
We consider the quasiparticle c-axis conductivity in highly anisotropic layered compounds in the presence of the magnetic field parallel to the layers. We show that at low temperatures the quasiparticle interlayer conductivity depends strongly on the orientation of the in-plane magnetic field if the excitation gap has nodes on the Fermi surface. Thus measurements of the angle-dependent c-axis (out-of-plane) magnetoresistance, as a function of the orientation of the magnetic field in the layers, provide information on the momentum dependence of the superconducting gap (or pseudogap) on the Fermi surface. Clean and highly anisotropic layered superconductors seem to be the best candidates for probing the existence and location of the nodes on the Fermi surface.
Bulaevskii Lev N.
Graf Matthias. J.
Maley Martin P.
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