Fourfold symmetry of vortex state of d-wave superconductivity and torque magnetometry
Department of Physics and Interdisciplinary Research Center in Physical Science,
University - Chunchon 200-702, South Korea
2 Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484, USA
Accepted: 2 April 1996
We have shown earlier that the upper critical field Hc2 of -superconductor in a magnetic field in the (a,b)-plane exhibits the fourfold symmetry, though this anisotropy vanishes like as the temperature T approaches the transition temperature Tc. We propose here that the torque within the (a,b)-plane should provide a sensitive means to determine this anisotropy.
PACS: 74.60.Ec – Mixed state, critical fields, and surface sheath / 74.72.-h – High-Tc cuprates
© EDP Sciences, 1996