Vortex state of ad-wave superconductor in high-cuprates
- 1 March 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 53 (9) , 5927-5931
- https://doi.org/10.1103/physrevb.53.5927
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.Keywords
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