Abstract
Measurements of the nonlinear transverse magnetic moment have been carried out on disk-shaped samples of YBCO, using an ac technique. Numerical calculations for a d x 2- y 2 pairing state predict a fourfold modulation of this moment as a function of the angle between the applied magnetic and the crystalline axes for a magnetic field applied in the a–b plane of the sample. Our results imply a minimum nonzero gap at all points on the Fermi surface.
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Bhattacharya, A., Goldman, A.M., Zutic, I. et al. Investigation of the Symmetry of the Pairing State in YBa2Cu3O7−δ Using the Nonlinear Transverse Magnetic Moment: Experimental Results. Journal of Superconductivity 12, 99–103 (1999). https://doi.org/10.1023/A:1007738123479
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DOI: https://doi.org/10.1023/A:1007738123479