Vortex state of a d-wave superconductor in high-Tc cuprates

Hyekyung Won and Kazumi Maki
Phys. Rev. B 53, 5927 – Published 1 March 1996
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Abstract

We study theoretically the vortex state of a d-wave superconductor in a magnetic field parallel to the c axis. We find, except in the immediate vicinity of the superconducting transition temperature, that a square lattice tilted by π/4 from the a axis gives the most stable configuration, which provides the simplest interpretation of a recent small angle neutron scattering experiment by Keimer et al. and a more recent scanning tunnel microscope experiment by Maggio-Aprile et al. The residual density of states is shown to follow a √B law in a wide field region consistent with an earlier prediction by Volovik. The effect of d-s mixture is also studied. The most important effect appears to be a suppression of the upper critical field at low temperatures by 5–10 %. © 1996 The American Physical Society.

  • Received 3 October 1995

DOI:https://doi.org/10.1103/PhysRevB.53.5927

©1996 American Physical Society

Authors & Affiliations

Hyekyung Won

  • Department of Physics and Interdisciplinary Research Center in Physical Science, Hallym University, Chunchon, 200-702, South Korea

Kazumi Maki

  • Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484

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Issue

Vol. 53, Iss. 9 — 1 March 1996

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